chapter 9 and 10

An origin of the supinator is the __________. An origin of the supinator is the __________. radius supinator crest of the humerus ulna lateral epicondyl of the humerus

lateral epicondyl of the humerus

An insertion of the fibularis longus is the __________. An insertion of the fibularis longus is the __________. distal phalanx of digit one base of metatarsal five medial cuneiform base of metatarsal two

medial cuneiform

Each neuron shown in this figure innervates a group of muscle fibers. What is the term for a group of muscle fibers innervated by a single neuron? neuromuscular junction sarcomere motor unit fascicle

motor unit fascicle SubmitPrevious Answers Correct A group of muscle fibers innervated by a single neuron is called a motor unit.

Your elderly patient recovering from knee replacement surgery doesn't understand why she has to do rehabilitation of the muscles around her knee. How would you explain it to her? Your elderly patient recovering from knee replacement surgery doesn't understand why she has to do rehabilitation of the muscles around her knee. How would you explain it to her? "You've been off your feet for awhile and we want to make sure you exercise to build your stamina back up." "We need to make sure the replacement holds up to your knee moving." "We don't want to risk you getting a blood clot in the knee area." "The large muscle groups that surround the knee are just as important as the bones in making sure your knee is stable. You need to strengthen them to support your new knee."

"The large muscle groups that surround the knee are just as important as the bones in making sure your knee is stable. You need to strengthen them to support your new knee." Correct Much of the stability of the knee joint is created by the tension between the large quadriceps group anteriorly and the hamstrings group posteriorly.

Which type of muscle is found in the body wall of hollow organs? Which type of muscle is found in the body wall of hollow organs? cardiac muscle multi unit smooth muscle skeletal muscle unitary smooth muscle

Which type of muscle is found in the body wall of hollow organs? Which type of muscle is found in the body wall of hollow organs? cardiac muscle multi unit smooth muscle skeletal muscle unitary smooth muscle SubmitPrevious Answers Correct Smooth muscle is generally classified as either unitary smooth muscle or multi unit smooth muscle. The type of muscle found in the walls of most hollow organs is unitary smooth muscle. Provide Feedback Next ANSWER; unitary smooth muscle

The prime mover of hip extension is the __________. The prime mover of hip extension is the __________. adductor magnus pectineus gluteus maximus gracilis

gluteus maximus

The hamstring muscles originate on the __________. The hamstring muscles originate on the __________. ischial tuberosity medial surface of the fibula lesser trochanter of the femur medial surface of the tibia

ischial tuberosity

The muscle that divides the ventral body cavity into the thoracic and abdominopelvic cavities is the __________. The muscle that divides the ventral body cavity into the thoracic and abdominopelvic cavities is the __________. transversus abdominis diaphragm psoas major internal oblique

diaphragm

The lateral rotators act on the __________. The lateral rotators act on the __________. os coxae sacrum femur lumbar vertebrae

femur

Eversion of the foot is a function of the __________. Eversion of the foot is a function of the __________. fibularis longus extensor hallucis tibialis anterior extensor digitorum

fibularis longus Correct! The fibularis longus plantar flexes and everts the foot. Other muscles that also evert the foot include the fibularis tertius and the fibularis brevis.

Which muscle acts as both a knee (leg) extensor and hip (thigh) flexor? Which muscle acts as both a knee (leg) extensor and hip (thigh) flexor? gluteus maximus biceps femoris rectus femoris vastus lateralis

rectus femoris

The posterior scapular muscle that crosses the glenohumeral joint is the __________. The posterior scapular muscle that crosses the glenohumeral joint is the __________. teres minor pectoralis major teres major latissimus dorsi

teres major

Which of the following is not a rotator cuff muscle? Which of the following is not a rotator cuff muscle? teres major supraspinatus infraspinatus subscapularis

teres major

Which deep posterior extensor of the wrist originates on the radius and ulna and interosseous membrane? Which deep posterior extensor of the wrist originates on the radius and ulna and interosseous membrane? the abductor pollicis longus the extensor pollicis longus the extensor pollicis brevis the extensor indicis

the abductor pollicis longus

The prime mover of dorsiflexion is the __________. The prime mover of dorsiflexion is the __________. tibialis anterior fibularis tertius extensor hallucis longus extensor digitorum longus

tibialis anterior

The main forearm extensor is the __________. The main forearm extensor is the __________. biceps brachii triceps brachii brachilais coracobrachialis

triceps brachii

All of the muscles that originate from the medial epicondyle of the humerus have one of two functions. Which of the following pairs is correct? All of the muscles that originate from the medial epicondyle of the humerus have one of two functions. Which of the following pairs is correct? wrist flexion and forearm pronation wrist extension and forearm supination wrist flexion and supination forearm flexion and wrist flexion

wrist flexion and forearm pronation

MATCH VOCAB AND PREFIXES

TOM TEXTED ANSWER PICTURES

The muscle that generates the most power during elbow flexion is the __________. The muscle that generates the most power during elbow flexion is the __________. brachialis brachioradialis biceps brachii triceps brachii

brachialis

The soleus and the gastrocnemius share an insertion on the __________. The soleus and the gastrocnemius share an insertion on the __________. calcaneus medial cuneiform fibula distal phalanx

calcaneus

Wrist abduction occurs through the actions of __________ muscles. Wrist abduction occurs through the actions of __________ muscles. three five four two

4

Abduction requires the action of two muscles, and adduction requires the action of __________. Abduction requires the action of two muscles, and adduction requires the action of __________. four muscles one muscle two muscles three muscles

4 MUSCLES

extensor digitorum longus

A B C D SubmitPrevious Answers Correct The extensor digitorum longus is on the anterolateral surface of the leg; it is lateral to the tibialis anterior muscle.

In which phase in the figure would the net movement of Ca2+ INTO the sarcoplasmic reticulum (SR) be greatest? In which phase in the figure would the net movement of Ca2+ INTO the sarcoplasmic reticulum (SR) be greatest? A B C

A B C (sarah: text page 297 old text item 3 under twitch) SubmitPrevious Answers Correct During the period of relaxation (C), Ca2+ is transported by active transport into the SR. Decreased Ca2+ concentrations in the sarcoplasm leads to detachment of cross bridges and, consequently, decreased contractile force.

Strengthening the quadriceps femoris muscles is likely to result in which of the following? Strengthening the quadriceps femoris muscles is likely to result in which of the following? A more stable knee joint More rapid knee flexion Greater range of motion in lateral thigh abduction A more stable ankle joint

A more stable knee joint

Your patient has been referred to a physical therapist because of chronic low back pain. Which of these muscle groups would you expect the therapist to target most? Your patient has been referred to a physical therapist because of chronic low back pain. Which of these muscle groups would you expect the therapist to target most? Pectorals Abdominals Rhomboids Quadriceps

Abdominal

Identify the gluteus maximus muscle.

B IN THE PICTURE, THE ASS

Mrs. Tanner's difficulty flexing her leg at the knee is most likely due to problems with: Mrs. Tanner's difficulty flexing her leg at the knee is most likely due to problems with: The gastrocnemius. The biceps femoris. The quadriceps femoris. The biceps brachii.

BICEPS FEMORIS

The __________ is a prime mover of the glenohumeral joint during flexion. The __________ is a prime mover of the glenohumeral joint during flexion. biceps brachii deltoid coracobrachialis teres major

DELTOID

Which of the following muscles does the phrenic nerve innervate? Which of the following muscles does the phrenic nerve innervate? the diaphragm the sternocleidomastoid muscles the internal intercostals the external intercostals

DIAPHRAGM BUT IM FALLING ASLEEP RIGHT NOW

The longer a muscle is when it starts contracting, the more tension it can generate in the contraction. The longer a muscle is when it starts contracting, the more tension it can generate in the contraction. True False

False SubmitPrevious Answers Correct Maximum muscle contraction occurs in an intermediate range for the muscle where there is both a good number of cross bridges that can form and room for the sarcomere to shorten. If a muscle is too long, there will not be enough cross bridges that can form to generate tension.

The rotator cuff is a term used to describe the group of muscles and tendons that stabilize and reinforce the __________. The rotator cuff is a term used to describe the group of muscles and tendons that stabilize and reinforce the __________. scapula pectoral girdle elbow joint glenohumeral joint

GLENOHUMERAL JOINT

All the tendons of the rotator cuff muscles combine at which location? All the tendons of the rotator cuff muscles combine at which location? humeral head coranoid process radial tuberosity scapula

HUMERAL HEAD

The primary function of the deep muscles of the thorax, such as the intercostals, is to promote __________. The primary function of the deep muscles of the thorax, such as the intercostals, is to promote __________. swallowing vomiting back posture breathing

HYPERVENTILATING AT THESE QUESTIONS, ER, BREATHING...

Which of the following factors influence the velocity and duration of muscle contraction? Which of the following factors influence the velocity and duration of muscle contraction? muscle fiber size frequency of stimulation length of muscle fibers activated load placed on the muscle

LOAD PLACED Which of the following factors influence the velocity and duration of muscle contraction? Which of the following factors influence the velocity and duration of muscle contraction? muscle fiber size frequency of stimulation length of muscle fibers activated CORRECT: load placed on the muscle SubmitPrevious Answers Correct Speed (velocity) of shortening is a function of load and muscle-fiber type. Contraction is fastest when the load on the muscle is zero; a greater load results in a slower contraction and a shorter duration of contraction.

o keep the humeral head centered within the glenoidal cavity the rotator cuff muscles must be __________. To keep the humeral head centered within the glenoidal cavity the rotator cuff muscles must be __________. located distally located posteriorly located anteriorly located in the same plane

LOCATED IN THE SAME PLANE

Which of the following statements about muscles of the elbow joint is true? Which of the following statements about muscles of the elbow joint is true? The brachioradialis originates and inserts on the ulna. The biceps brachii is a posterior extensor. The biceps brachii has two heads that share the same origin site. None of these statements is correct.

NONE ARE CORRECT

The prime mover of elbow extension is the __________. The prime mover of elbow extension is the __________. triceps brachii anconeus biceps brachii brachialis

TRIS

If both motor neurons shown in this figure were to develop action potentials and stimulate muscle fibers, would all the muscle cells shown here contract? Yes, because an entire muscle only needs one neuron to stimulate it in order to contract. No, because neurons in this figure do not innervate every muscle cell shown. Yes, because signals can be passed from stimulated muscle fibers to unstimulated ones. No, because it is impossible for more than one motor unit to contract at once.

No, because neurons in this figure do not innervate every muscle cell shown. Yes, because signals can be passed from stimulated muscle fibers to unstimulated ones. No, because it is impossible for more than one motor unit to contract at once. SubmitPrevious Answers Correct Only five muscle fibers shown are innervated. The others would not contract unless they were stimulated by other neurons that are not shown.

The angle of which muscle prevents the humeral head from sliding upward out of the joint as the arm is raised? The angle of which muscle prevents the humeral head from sliding upward out of the joint as the arm is raised? teres minor subscapularis supraspinatus infraspinatus

SUBSCAPULARIS

Downward dislocation of the humerus from the glenohumeral joint when carrying weight is prevented by the __________. Downward dislocation of the humerus from the glenohumeral joint when carrying weight is prevented by the __________. infraspinatus muscle teres minor muscle supraspinatus muscle subscapularis muscle

SUPRASPINATUS MUSCLE

The anterior compartment of the thigh is involved in lower leg extension. The anterior compartment of the thigh is involved in lower leg extension. True False

T

Which muscle is not part of the rotator cuff? Which muscle is not part of the rotator cuff? teres minor muscle infraspinatus muscle teres major muscle supraspinatus muscle

TERES MAJOR MUSCLE

The energy reserves for which of the ATP regenerating pathways will be depleted first during an extended period of light to moderate exercise? The energy reserves for which of the ATP regenerating pathways will be depleted first during an extended period of light to moderate exercise? aerobic respiration direct phosphorylation of ADP by creatine phosphate breakdown of stored glycogen anaerobic glycolysis

The energy reserves for which of the ATP regenerating pathways will be depleted first during an extended period of light to moderate exercise? The energy reserves for which of the ATP regenerating pathways will be depleted first during an extended period of light to moderate exercise? aerobic respiration YES direct phosphorylation of ADP by creatine phosphate breakdown of stored glycogen anaerobic glycolysis SubmitPrevious Answers Correct This rapid ATP-synthesizing pathway only lasts for about 15 seconds.

The tensor fascia latae is involved in hip __________. The tensor fascia latae is involved in hip __________. extension abduction lateral rotation adduction

abduction

The medial muscles of the hip joint that insert on the linea aspera are the __________. The medial muscles of the hip joint that insert on the linea aspera are the __________. adductor magnus, adductor brevis, and adductor longus adductor magnus, adductor brevis, and pectineus pectineus, adductor magnus, and adductor longus gracilis, adductor magnus, pectineus, and adductor longus

adductor magnus, adductor brevis, and adductor longus

f both of the neurons in the figure were activated, more muscle fibers would contract than if either neuron alone were active. This mechanism for control of the force of muscle contraction is known as __________. excitation-contraction coupling recruitment (correct answer) wave summation tetanus SubmitPrevious Answers Correct 0 refers to the increased force generated by the activation of increasing numbers of motor units.

excitation-contraction coupling recruitment (correct) wave summation tetanus SubmitPrevious Answers Correct 0 refers to the increased force generated by the activation of increasing numbers of motor units.

The prime mover of wrist extension is the __________. The prime mover of wrist extension is the __________. extensor carpi radialis longus extensor carpi radialis brevis extensor digitorum extensor carpi ulnaris

extensor digitorum

The iliacus and the psoas major muscles are collectively known as the ____________ muscle because they share a common insertion on the __________ of the femur. The iliacus and the psoas major muscles are collectively known as the ____________ muscle because they share a common insertion on the __________ of the femur. psoasiliacus; lesser trochanter iliopsoas; greater trochanter iliopsoas; lesser trochanter psoasiliacus; greater trochanter

iliopsoas; lesser trochanter

The flexor hallucis longus muscle originates on the __________. The flexor hallucis longus muscle originates on the __________. interosseous membrane femur distal phalanges of digits 2-5 medial cuneiform

interosseous membrane

The palmaris longus inserts on the __________. The palmaris longus inserts on the __________. bodies of phalanges 2-5 bases of the second and third metacarpals palmar aponeurosis medial epicondyle of the humerus

palmar aponeurosis

The most powerful movement at the ankle joint is __________, and the ________ is one of the prime movers of this movement. The most powerful movement at the ankle joint is __________, and the ________ is one of the prime movers of this movement. plantar flexion; tibialis anterior plantar flexion; gastrocnemius dorsiflexion; tibialis anterior dorsiflexion; gastrocnemius

plantar flexion; gastrocnemius

To allow for flexion, the __________ unlocks the knee joint. To allow for flexion, the __________ unlocks the knee joint. popliteus biceps femoris semimembranosus sartorius

popliteus

The piriformis originates on the __________ and inserts on the __________. The piriformis originates on the __________ and inserts on the __________. ischium; greater trochanter of the femur ischium; lesser trochanter of the femur sacrum; lesser trochanter of the femur sacrum; greater trochanter of the femur

sacrum; greater trochanter of the femur

Art-based Question: Muscles, Question 27 39 of 63 Complete Review Part A Part complete What is the action of the muscle identified by the letter A? What is the action of the muscle identified by the letter A? It abducts and medially rotates the thigh and steadies the pelvis. It is an extremely important muscle for walking. It is a major extensor of the thigh. It laterally rotates and abducts the thigh. The anterior part of this muscle adducts and medially rotates and flexes the thigh, while the posterior part of this muscle is a synergist of the hamstrings to extend the thigh. It adducts the thigh and flexes and medially rotates the leg (especially during walking). SubmitPrevious Answers Correct This is the action of the gluteus medius muscle.

Art-based Question: Muscles, Question 27 39 of 63 Complete Review Part A Part complete What is the action of the muscle identified by the letter A? What is the action of the muscle identified by the letter A? It abducts and medially rotates the thigh and steadies the pelvis. It is an extremely important muscle for walking. It is a major extensor of the thigh. It laterally rotates and abducts the thigh. The anterior part of this muscle adducts and medially rotates and flexes the thigh, while the posterior part of this muscle is a synergist of the hamstrings to extend the thigh. It adducts the thigh and flexes and medially rotates the leg (especially during walking). SubmitPrevious Answers Correct This is the action of the gluteus medius muscle.

Which of the following muscles assists during extension of the glenohumeral joint, but is not as a prime mover? Which of the following muscles assists during extension of the glenohumeral joint, but is not as a prime mover? teres major latissimus dorsi deltoid biceps brachii

TERES MAJOR

he interosseous membrane is located between the __________. The interosseous membrane is located between the __________. ulna and the carpal bones of the wrist humerus and radius radius and ulna humerus and ulna

Radius and ulna

Isometric contractions are important contractions that allow humans to hold their posture over time. Isometric contractions are important contractions that allow humans to hold their posture over time. True False

SARAH P 301 IN THE TEXT Isometric contractions are important contractions that allow humans to hold their posture over time. Isometric contractions are important contractions that allow humans to hold their posture over time. True False SubmitPrevious Answers Correct TRUE Muscle produces enough tension to support the skeleton, but not move it, creating the conditions for posture in humans.

Which superficial flexor muscle of the forearm is the most lateral? Which superficial flexor muscle of the forearm is the most lateral? flexor carpi ulnaris palmaris longus flexor digitorum superficialis flexor carpi radialis

flexor carpi radialis

Which muscle is a superficial anterior flexor muscle? Which muscle is a superficial anterior flexor muscle? flexor digitorum superficialis flexor digitorum profundus flexor pollicis longus flexor digiti minimi brevis

flexor digitorum superficialis

Which muscle of the wrist and fingers is a deep anterior flexor? Which muscle of the wrist and fingers is a deep anterior flexor? flexor digitorum superficialis flexor pollicis longus palmaris longus flexor carpi ulnaris

flexor pollicis longus

ithout lateral rotation of the humerus by the teres minor and infraspinatus muscles, the maximum angle of abduction by the deltoid would be __________. Without lateral rotation of the humerus by the teres minor and infraspinatus muscles, the maximum angle of abduction by the deltoid would be __________. 90 degrees 30 degrees 75 degrees 180 degrees

90 DEGREES

In which phase of the muscle twitch shown in the figure would the maximum amount of ATP be consumed by myosin head groups? In which phase of the muscle twitch shown in the figure would the maximum amount of ATP be consumed by myosin head groups? A B C

A B C SubmitPrevious Answers Correct Myosin heads catalyze the hydrolysis of ATP to power the sliding of myofilaments. This event would be at a maximum during the period of contraction (B).

A muscle that is lengthening while it produces tension is performing a(n) __________ contraction. A muscle that is lengthening while it produces tension is performing a(n) __________ contraction. maximal eccentric isometric concentric

A: ECCENTRIC maximal eccentric isometric concentric SubmitPrevious Answers Correct During isotonic, eccentric contractions, muscle lengthens as it generates tension, but not enough force, to overcome the load. We use eccentric contractions to lower objects (such as lowering a book from the shelf or lowering the barbell during a bench press).

The location of the rotator cuff muscles in relation to the glenohumoral joint minimizes the upward pressure against the __________. The location of the rotator cuff muscles in relation to the glenohumoral joint minimizes the upward pressure against the __________. humerus acromion of the scapula clavicle coracoid process of the scapula

ACROMION OF THE SCAPULA

The smallest of the posterior extensors of the elbow joint is the __________. The smallest of the posterior extensors of the elbow joint is the __________. triceps brachii brachioradialis anconeus biceps brachii

ANCONEUS

Slow oxidative muscle fibers are best suited for __________. Slow oxidative muscle fibers are best suited for __________. running a 100-yard dash running a marathon lifting heavy weights at the gym hitting a baseball

ANSWER IS CHART ON PAGE 306 OF OLD TEXT Slow oxidative muscle fibers are best suited for __________. Slow oxidative muscle fibers are best suited for __________. running a 100-yard dash CORRECT: running a marathon lifting heavy weights at the gym hitting a baseball SubmitPrevious Answers Correct Slow oxidative muscle fibers are best suited for endurance activities, such as long distance running, cycling, or rowing

Which of the following statements is NOT true regarding ATP production in muscles during periods of prolonged energy use, such as exercise? Which of the following statements is NOT true regarding ATP production in muscles during periods of prolonged energy use, such as exercise? Prolonged activity requires the use of aerobic pathways for ATP regeneration. As your blood sugar drops at any time during prolonged activity, glycogen stores in your muscles can be broken down to supply a glucose source. In the absence of oxygen, anaerobic pathways provide minimal ATP regeneration for less than a minute. In the absence of oxygen, creatine phosphate can drive aerobic respiration pathways for a few minutes.

CP IS FALSE Prolonged activity requires the use of aerobic pathways for ATP regeneration. As your blood sugar drops at any time during prolonged activity, glycogen stores in your muscles can be broken down to supply a glucose source. In the absence of oxygen, anaerobic pathways provide minimal ATP regeneration for less than a minute. In the absence of oxygen, creatine phosphate can drive aerobic respiration pathways for a few minutes. SubmitPrevious Answers Correct This is not true for a few reasons. First, creatine phosphate directly phosphorylates ATP instead of providing any support for aerobic pathways. Second, creatine phosphate stores are used up in about 15 seconds. Third, a cell doesn't need an oxygen deficit for creatine phosphate to be activated; it just needs to be short on ATP.

CHAPTER 10 The action that moves the scapula towards the head is called __________. The action that moves the scapula towards the head is called __________. retraction protraction medial rotation elevation

ELEVATION

hich movement is not associated with the scapula? Which movement is not associated with the scapula? elevation protraction opposition depression

OPPOSITION, THATS THE THUMB

Which muscle fiber type is best suited for endurance activities, such as long-distance jogging? Which muscle fiber type is best suited for endurance activities, such as long-distance jogging? slow glycolytic fibers fast oxidative fibers slow oxidative fibers fast glycolytic fibers

PAGE 306 AGAIN SAME ANSWER AS THE MARATHON RUNNER Which muscle fiber type is best suited for endurance activities, such as long-distance jogging? Which muscle fiber type is best suited for endurance activities, such as long-distance jogging? slow glycolytic fibers fast oxidative fibers ANSWER: slow oxidative fibers fast glycolytic fibers SubmitPrevious Answers Correct Slow oxidative fibers are best suited for endurance activities because they produce ATP aerobically and are fatigue-resistant.

The muscles that extend the forearm are located __________. The muscles that extend the forearm are located __________. laterally posteriorly anteriorly medially

POSTERIORLY

Which of the following letters represents the infraspinatus muscle?

QUIZLET GOT THIS WRONG ON THREE SITES SHIT SHIT SHIT ITS C NOT B

The two heads of the biceps brachii muscle come together distally to insert on the __________. The two heads of the biceps brachii muscle come together distally to insert on the __________. ulnar tuberosity radial tuberosity deltoid tuberosity styloid process of the radius

RADIAL TUBEROSITY

The two heads of the biceps brachii muscle converge distally to insert on the __________. The two heads of the biceps brachii muscle converge distally to insert on the __________. radial tuberosity ulna scapula ulnar notch

RADIAL TUBEROSITY BUT I HATE THESE FRIGGING 3 PART VIDEO QUESTIONS THEY TAKE TOO MUCH TIME!

Unlike skeletal muscle, smooth muscle may spontaneously contract when it is stretched. What feature of smooth muscle allows it to stretch without immediately resulting in a strong contraction? Unlike skeletal muscle, smooth muscle may spontaneously contract when it is stretched. What feature of smooth muscle allows it to stretch without immediately resulting in a strong contraction? smooth muscle tone low energy requirements slow, prolonged contractile activity stress-relaxation response SEE AND STUDY THIS SITE: http://www.easynotecards.com/print_list/19648

STRESS RELAXATION RESPONSE Unlike skeletal muscle, smooth muscle may spontaneously contract when it is stretched. What feature of smooth muscle allows it to stretch without immediately resulting in a strong contraction? Unlike skeletal muscle, smooth muscle may spontaneously contract when it is stretched. What feature of smooth muscle allows it to stretch without immediately resulting in a strong contraction? smooth muscle tone low energy requirements slow, prolonged contractile activity stress-relaxation response SubmitPrevious Answers Correct Stretching of smooth muscle provokes contraction; however, the increased tension persists only briefly, and soon the muscle adapts to its new length and relaxes, while still retaining the ability to contract on demand. The stress-relaxation response of smooth muscle allows a hollow organ to fill or expand slowly to accommodate a greater volume without promoting strong contractions that would expel its contents.

One brief stimulus of a skeletal muscle may result in a single isolated contractile event, which is called a twitch. One twitch can generate max tension in a muscle. Are these statements true or false? One brief stimulus of a skeletal muscle may result in a single isolated contractile event, which is called a twitch. One twitch can generate max tension in a muscle. Are these statements true or false? Both of these statements are false. The first statement is true; the second statement is false. Both statements are true. The first statement is false; the second statement is true.

THE DAMN BOOK AND ONLINE BOTH GOT THIS ONE WRONG! Both of these statements are false. A: FIRST TRUE, SECOND FALSE... The first statement is true; the second statement is false. Both statements are true. The first statement is false; the second statement is true. SubmitPrevious Answers Correct A single stimulation may result in a single muscle twitch. However, a single twitch would not generate any meaningful tension in a skeletal muscle.

Which of the following statements is FALSE? Which of the following statements is FALSE? Skeletal muscle cells contain myoglobin. Skeletal muscle cells have T tubules. Skeletal muscle cells use creatine phosphate instead of ATP to do work. Skeletal muscle cells have glycosomes. Skeletal muscle cells are multinucleated.

THEY DO USE ATP SO D IS FALSE Skeletal muscle cells contain myoglobin. Skeletal muscle cells have T tubules. Skeletal muscle cells use creatine phosphate instead of ATP to do work. Skeletal muscle cells have glycosomes. Skeletal muscle cells are multinucleated. SubmitPrevious Answers Correct Muscle cells, just like other cells, use ATP to do work. Creatine phosphate is used by muscle cells to directly phosphorylate (i.e., donate a high-energy phosphate group to) ADP to resynthesize ATP.

A muscle that originates on the posterior surface of the ischium and inserts on the posterior surface of the tibia will: A muscle that originates on the posterior surface of the ischium and inserts on the posterior surface of the tibia will: Flex the leg at the knee. Flex the leg and extend the thigh. Flex the thigh at the hip. Extend the leg at the knee. Flex the thigh and extend the leg. Extend the thigh at the hip. SubmitPrevious Answers Correct This muscle will pull the leg posteriorly at both hip and knee joints, straightening the hip and flexing the leg at the knee.

THIS WAS A BITCH CAUSE THEY DIDNT NAME THE MUSCLE Flex the leg and extend the thigh.

Which of the following statements about muscles of the forearm is true? Which of the following statements about muscles of the forearm is true? The pronator teres originates on the medial epicondyle and inserts on the radius. Contraction of the pronator quadratus and the supinator results in forearm pronation. The pronator quadratus is a two-headed muscle. The pronator quadratus originates on the radius and inserts on the ulna.

The pronator teres originates on the medial epicondyle and inserts on the radius.

What result would be expected if an additional stimulus, equal in intensity to the first, were to be applied to the muscle at the 60 millisecond (ms) time point? The tension exerted by the muscle would continue to decrease, but at a significantly slower rate than observed without the second stimulus. The muscle would quickly return to the fully relaxed state of minimum tension. Tension would increase to the same maximum force measured at the beginning of phase C. The muscle would increase in tension to a level greater than that measured at the beginning of phase C.

The tension exerted by the muscle would continue to decrease, but at a significantly slower rate than observed without the second stimulus. The muscle would quickly return to the fully relaxed state of minimum tension. Tension would increase to the same maximum force measured at the beginning of phase C. ---yes--> The muscle would increase in tension to a level greater than that measured at the beginning of phase C. SubmitPrevious Answers Correct The second, more forceful contraction that would occur by adding another stimulus before the muscle has completely relaxed is an example of wave summation.

What level of structural organization does the actin and myosin in a sarcomere of a muscle fiber represent? What level of structural organization does the actin and myosin in a sarcomere of a muscle fiber represent? Organ Molecular Cellular Tissue

Tissue SubmitPrevious Answers Correct You should recall that even muscle sarcolemma does not meet the criteria of a tissue.

What cell organelle plays a role in the process of regulating intracellular calcium ions for muscle contraction? What cell organelle plays a role in the process of regulating intracellular calcium ions for muscle contraction? RIGHT ANSWER; Endoplasmic reticulum Mitochondrion Ribosome Lysosomes

What cell organelle plays a role in the process of regulating intracellular calcium ions for muscle contraction? What cell organelle plays a role in the process of regulating intracellular calcium ions for muscle contraction? RIGHT ANSWER; Endoplasmic reticulum Mitochondrion Ribosome Lysosomes SubmitPrevious Answers Correct

You awaken with a "stiff neck," which causes pain when you turn your head or flex your neck. Which muscle is LEAST likely to be causing the problem? You awaken with a "stiff neck," which causes pain when you turn your head or flex your neck. Which muscle is LEAST likely to be causing the problem? Splenius capitis Sternocleidomastoid Trapezius Platysma SubmitPrevious Answers Correct

You awaken with a "stiff neck," which causes pain when you turn your head or flex your neck. Which muscle is LEAST likely to be causing the problem? You awaken with a "stiff neck," which causes pain when you turn your head or flex your neck. Which muscle is LEAST likely to be causing the problem? Splenius capitis Sternocleidomastoid Trapezius ---->Platysma SubmitPrevious Answers Correct The platysma is a thin, flat muscle on the anterior neck. Its main role is to tense the skin of the neck, earning it a starring role in razor commercials and the nickname of the "shaving muscle."

Forearm supination is assisted by the __________. Forearm supination is assisted by the __________. triceps brachii biceps brachii brachioradialis supinator

biceps brachii

The deep posterior extensor of the wrist and fingers __________. The deep posterior extensor of the wrist and fingers __________. controls the index finger and wrist controls the thumb and wrist controls the thumb and index finger controls all four digits

controls the thumb and index finger

The coracobrachialis muscle originates on the __________. The coracobrachialis muscle originates on the __________. greater tuberosity of the humerus coracoid process of the scapula medial surface of the humeral shaft radial tuberosity

coracoid process of the scapula

The extensor muscle that branches to form four tendons on the back of the hand is the __________. The extensor muscle that branches to form four tendons on the back of the hand is the __________. extensor carpi radialis brevis extensor digitorum extensor carpi radialis longus extensor ulnaris

extensor digitorum

The two muscles that insert on the fifth phalanx or on the fifth metatarsal are the __________. The two muscles that insert on the fifth phalanx or on the fifth metatarsal are the __________. extensor digitorum longus and fibularis longus fibularis tertius and extensor hallucis longus fibularis longus and extensor hallucis longus extensor digitorum longus and fibularis tertius

extensor digitorum longus and fibularis tertius

gracilis semitendinosus semimembranosus biceps femoris SubmitPrevious Answers Correct The biceps femoris is the most lateral muscle of the hamstrings group.

gracilis semitendinosus semimembranosus biceps femoris SubmitPrevious Answers Correct The biceps femoris is the most lateral muscle of the hamstrings group.

Which muscle would be a prime mover of knee extension?

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The origin of the long head of the triceps brachii is on the __________. The origin of the long head of the triceps brachii is on the __________. anterior shaft of the humerus posterior shaft of the humerus olecranon process of the ulna infraglenoid tubercle of the scapula

infraglenoid tubercle of the scapula

The anterior muscles of the thigh that originate on the os coxae are __________. The anterior muscles of the thigh that originate on the os coxae are __________. rectus femoris; vastus medialis sartorius; rectus femoris sartorius; vastus medialis vastus lateralis; vastus medialis

sartorius; rectus femoris

Which movement results after the contraction of the serratus anterior muscle? Which movement results after the contraction of the serratus anterior muscle? scapular elevation scapular protraction and rotation abduction of the humerus scapular retraction

scapular protraction and rotation