Muscular System Test

Which of the following is characteristic of cardiac muscle? a. Cardiac muscles are only made of fast fibers b. Cardiac muscle cells are involuntary c. Cardiac muscle fibers are faster than skeletal muscles. d. Cardiac muscle fibers are a mix of skeletal muscle and cardiac cells.

b. Cardiac muscle cells are involuntary

Which filament is a thin twisted protein that contains specific active sites? a. Actin b. Myosin c. Troponin d. Tropomysin

a. Actin

What type of endurance is gained from preforming increased amounts of brief, intense workouts. Such as sprinting or weightlifting. a. Anaerobic endurance b. Aerobic endurance

a. Anaerobic endurance

After death, rigor mortis lasts until a. Decomposition begins b. The body is buried c. 24 hours after blood flow stops d. Calcium ions flood the myofiber

a. Decomposition begins

Which statement regarding "heat loss" is true? a. Muscle contractions play an important role in the maintenance of normal body temperature. b. When skeletal muscles are contracting at peak levels, body temperature drops. c. Muscle activity does not generate heat. d. Shivering in a cold environment results in higher levels of heat loss.

a. Muscle contractions play an important role in the maintenance of normal body temperature

_________________ is the abductor of the shoulder a. Supraspinatus b. Latissimus dorsi c. Triceps brachii d. Trapezius

a. Supraspinatus

Which of the following terms is a descriptive word for a muscle's action? a. adductor b. biceps c. costalis d. obliques

a. adductor

In infants, which muscle produces suction for suckling at the breast ? a. buccinator b. levator labii c. orbicularis oris d. masseter

a. buccinator

Which of the following muscles is named for its shape? a. deltoid b. pectoralis major c. biceps brachii d. erector spinae

a. deltoid

A layer of collagen bers that surrounds an entire muscle is called ________. a. epimysium b. sarcolemma c. endomysium d. perimysium

a. epimysium

Match the muscle with its action from the list below. 1. rectus femoris 2. biceps femoris 3. gastrocnemius 4. masseter

a. extends leg at the knee b. flexes leg at the knee c. extension at the ankle d. elevated the mandible

Muscles whose names contain the root cervi- would be found in the a. neck. b. head. c. abdomen. d. chest.

a. neck

The less-movable end of a skeletal muscle is the a. origin. b. belly. c. distal end. d. insertion.

a. origin

The area between the Z lines is the _________. a. sarcomere b. myofilament c. sarcolemma d. myofibril

a. sarcomere

The following describes ___________ fibers. - Contains an increased amount of capillary networks, providing oxygen - Contain a red pigment called myoglobin - Contain oxygen reserves - Contain a relatively larger number of mitochondria than do fast muscle fibers a. Slow b. Fast

a. slow

At rest, active sites of the actin are covered by a. tropomyosin b. myosin c. troponin d. testosterone

a. tropomyosin

Muscles dominated by fast fibers appear _________. a. white b. purple c. blue d. red

a. white

Question 68 How do skeletal muscles produce movement ? a. By producing contractions, where energy is converted to body heat. b. By pulling on tendons that then moves bones. c. By contracting sphincter muscles. d. By supporting the muscles of t he abdominal wall.

b. By pulling on tendons that then move bones

Question 70 After a contraction, the sarcomere will return to a resting state; which is a. Latic acid builds in the muscle after oxygen depletion. b. Calcium ions deplete and troponin confirmation returns c. Tropomyosin moves from the active sites d. Calcium ions bind to troponin.

b. Calcium ions deplete in the muscle after oxygen depletion

Consider the Sliding Filament Theory: Observed changes in the sarcomere. Which band or line gets smaller during a muscle contraction ? a. H band b. Myosin c. I band d. Z line

c. I band

Name the highlighted muscle a. Deltoid b. Tensor fasciae latae c. Latissimus dorsi d. Trapezius

d. Trapezius

Myofibrils are made primarily of __________. a. tropomyosin b. troponin c. ATP and ADP d. actin and myosin

d. actin and myosin

The striated appearance of skeletal muscle results from a. the sarcoplasmic reticulum b. the shape of the epimysium c. the transverse tubule patters d. actin and myosin arrangement in the sarcomere

d. actin and myosin arrangement in the sarcomere

Match the word with the definition 1. Aponeurosis 2. Tendon 3. Diaphragm

1. A broad sheet of collagen fibers that connects muscles to each other. Similar to bones, but do not connect to a bone. 2. Connective tissue that attach muscle to bone 3. Muscle used for inhalation of breath

Match the agonist/antagonist muscle pairs 1. Latissimus dorsi 2. Biceps brachii 3. External intercostals 4. Diagastric 5. Pectoralis major 6. Tensor fasciae latae 7. Tibialis anterior

1. Deltoid 2. Triceps brachii 3. Internal intercostals 4. Masseter 5. Supraspinatus 6. Gluteus maximus 7. Gastrocnemius

Match the muscle name with the corresponding muscle 1. A: chest area 2. B: the area between neck and shoulders 3. C: main thigh

1. Pectoralis major 2. Trapezius 3. Rectuc femoris

Match the muscle name with the corresponding muscle 1. A: back of thigh 2. B: middle of the back 3. C: butt 4. D: shoulders 5. E: upper arm, back

1. Semitendinosus 2. Latissimus dorsi 3. Gluteus maximus 4. Deltoids 5; Triceps brachii

Match the origin with the muscle's name 1. buccinator 2. diagastric 3. internal intercostals 4. deltoid 5. flexor carpi ulnaris 6. tensor fasciae latae 7. biceps femoris 8. soleus 9. trapezius

1. maxillary/mandible 2. temporal bone/mandible 3. superior border of the preceding rib 4. clavicle/scapula 5. humerus/scapula 6. ilium 7. humerus 8. fibula/tibia 9. thoracic vertebrae

Match the insertion with the name of the muscle 1. External intercostals 2. Masseter 3. Latissimus dorsi 4. Biceps brachii 5. Flexor carpi radiallis 6. Sternocleidmastoid 7. Tibialis anterior

1. superior border next to the rib 2. Mandible 3. Humerus 4. Radius 5. Metacarpal 6. Mastoid of skull 7. Flexion at ankle

Match the letter on the diagram with the correct structure name 1. A: connects bone to muscle 2. B: outermost layer of muscle 3. C: middle layer of muscle 4 D: innermost layer of muscle

1. tendon 2. epimysium 3. perimysium 4. endomysium

Match the following terms correctly 1. actin 2. myosin 3. tendon 4. aponeurossi

1. thin filament 2. thick filament 3. attach muscle to bone 4. attach muscle to muscle (in some areas)

Which of the following statements describes how muscles help maintain homeostasis? a. Skeletal muscles are responsible for the pumping action of the heart. b. Skeletal muscle contractions help maintain body temperature. c. Skeletal muscles are responsible for guarding the openings of the digestive and urinary tracts. d. The contractions of skeletal muscles pull on tendons and move elements of the skeleton.

b. Skeletal muscle contractions help maintain body temperature.

Which of the following terms is a descriptive word for a muscle's action ? a. biceps b. adductor c. costalis d. insertion

b. adductor

Choose the 3 muscles that make up the hamstring group ? a. Triceps brachii b. Biceps femoris c. Semitendinosus d. Tibialis anterior e. Semimembranosus

b. biceps femoris c. semitendinosus e. semimembranosus

The supraspinatus assists the ______________ muscle. a. flexor digitorum b. deltoid c. sarcolemma d. gastrocnemius

b. deltoid

Muscle used for inhalation of breath a. sarcomere b. diaphragm c. masseter d. semimembranosus

b. diaphragm

Which of the following describes the action of the trapezius? a. provides medial rotation of the humerus b. extends the neck c. adducts the arm d. provides lateral rotation of the humerus e. adducts and flexes the humerus

b. extends the neck

The following describes _______ type of skeletal muscle fibers. - Produce powerful contractions - Fatigue rapidly - Few mitochondria a. slow b. fast

b. fast

Which of the following muscles acts to flex the finger joints and wrist? a. semimembranosus b. flexor digitorum c. tensor fasciae latae d. flexor carpi ulnaris

b. flexor digitorum

An Olympic long distance marathon winner most likely has an increase number of _______ muscle fibers. a. fast b. slow

b. slow

Nonstriated, involuntary muscle is a. red skeletal. b. smooth. c. cardiac. d. white skeletal.

b. smooth

Skeletal muscle fibers differ from "typical cells" in that these muscle fibers a. lack a plasma membrane. b. the name of the cytoplasm is sarcoplasm in the muscle cell. c. lack mitochondria. d. are much smaller than a "typical cell" and do not contain a vacuole

b. the name of the cytoplasm is sarcoplasm in the muscle cell

Which muscle inserts on the clavicle and scapula? a. sternocleidomastoid b. trapezius c. Buccinator d. pectoralis major

b. trapezius

What creates "cross bridges" a. change in troponin shape b. when the myosin heads bind to the active site c. When actin filaments slide d. When calcium binds to troponin

b. when the myosin heads bind to the active site

Which muscle has an action of hip extension. a. Rectus femoris b. Masseter c. Biceps brachii d. Gluteus maximus

d. Gluteus maximus

Which statement regarding skeletal muscle is true? a. Skeletal muscles do not contain connective tissue. b. Skeletal muscles do not contain nervous tissue. c. Skeletal muscles contain blood vessels. d. Skeletal muscles do not maintain body temperature.

c. Skeletal muscles contain blood vessels

_________________ is the abductior of the shoulder a. Triceps brachii b. Latissimus dorsi c. Supraspinatus d. Trapezius

c. Supraspinatus

________ allows for electrical stimuli sent from the brain, to reach deep into each fiber a. myofibrils b. Z lines c. T tubules d. I band

c. T tubules

_________ moves away from the active sites. a. Actin b. Cross-bridges c. Tropomyosin d. Myosin

c. Tropomyosin

What is the name of the areas circled in black ? a. Actin active sites b. H bands c. Z lines d. I bands

c. Z lines

The deltoid acts to a. laterally rotate the shoulder. b. medially rotate the shoulder. c. abduct the arm. d. adduct the arm. e.flex the wrist.

c. abduct the arm/shoulder

The muscle that compresses the cheeks, as when pursing the lips and blowing forcefully, is the ________. a. zygomaticus minor b. masseter c. buccinator d. orbicularis orbis

c. buccinator

A muscle _________ contains a sarcolemma, sarcoplasm, and myofibrils a. T-tubule b. intercalated disc c. fiber d. myofibril

c. fiber

The orgin of the soleus is ________ and the insertion is __________ a. Ischium; ulna b. Scapula; humerus c. Fibula/tibia; calcaneus d. Maxillary/mandible; Orbicularis oris

c. fibula/tibia; calcaneus

"anaerobic endurance" a. is used during long, slow athletic activities b. does not promote muscle growth c. is developed by performing frequent, brief, intense workouts d. is determined by the availability of carbohydrates, lipids or amino acids for breakdown

c. is developed by performing frequent, brief, intense workouts

The muscle that adducts the shoulder is the a. trapezius. b. deltoid. c. latissimus dorsi. d. triceps brachii.

c. latissimus dorsi

A sheath of connective tissue surrounding a bundle of striated muscle bers is called __________. a. sarcoplasmic reticulum b. endomysium c. perimysium d. epimysium

c. perimysium

The specific name for the plasma membrane of the myofiber. a. sarcolemma b. T tubule c. sarcoplasm d. myofibril

c. sarcolemma

A person whose genetic makeup makes him or her a better marathon runner than a sprinter probably has more __________ in his or her leg muscles. a. intermediate fibers b. dark fibers c. slow fibers d. fast fibers

c. slow fibers

Nonstriated, involuntary muscle is _________. a. intermediate skeletal b. cardiac c. smooth d. red skeletal

c. smooth

The muscle that inserts with the gastrocnemius to the calcaneus, via the calcaneal tendon, is the a. extensor digitorum. b. tibialis anterior. c. soleus. d. tibialis posterior.

c. soleus

What muscle types guard the entrance and exit of the body? a. skeletal b. abdominal muscles c. sphincters d. T tubules

c. sphincters

What is the indicated structure? pointing at white muscle near abs a. Actin b. Myoglobin c. Fast fibers d. Aponeurosis

d. Aponeurosis

A skeletal muscle that is not regularly stimulated by a motor neuron will become smaller and weaker; such as in those individuals that are paralyzed by spinal injuries. The term used when this occurs to the muscles is _______________. a. contraction b. isotonic c. glycolysis d. atrophy

d. atrophy

Which of the following acts to ex the elbow? a. pronator quadratus b. palmaris longus c. supinator d. biceps brachii e. triceps brachii

d. biceps brachii

Question 22 The muscle that exes the knee a. Digastric b. Flexor digitorium c. pectoralis major d. Biceps femoris

d. biceps femoris

Rigor mortis occurs at death due to a lack of a. destruction of tropomyosin b. increased presence of ADP within the sarcoplasm c. muscle relaxation at time of death. d. blood circulation to move calcium ions out of the cell.

d. blood circulation to move calcium ions out of the cell

Active muscles generate ________. a. heat and oxygen b. sodium and oxygen c. blood and sodium d. carbon dioxide and heat

d. carbon dioxide and heat

Question 20 Which of the following describes the action of the trapezius? a. adducts and flexes the humerus b. adducts the arm c. provides medial rotation of the humerus d. elevates, adducts, depresses, or rotates the scapula

d. elevates, adducts, depresses, or rotates the scapula

Which of the following is a muscle that originates from the zygomatic arch and functions in elevating the mandible? a. digastric b. frontalis c. temporalis d. masseter

d. masseter

Which of the following acts to ex the neck? a. supraspinatus b. tibialis anterior. c. triceps brachii d. sternocleidomastoid

d. sternocleidomastoid

Which of the following is an e ect of aging on the muscular system? a. Skeletal muscles become more elastic. b. Muscle bers contain more protein. c. Skeletal muscle bers become larger in diameter. d. Tolerance for exercise decreases.

d. tolerance for exercise decreases

Which muscle extends the elbow during the action of push-ups? a. deltoid b. pectoralis major c. biceps brachii d. triceps brachii

d. triceps brachii

Which of the following is a muscle that originates from the zygomatic arch and functions in elevating the mandible? a. frontalis b. medial pterygoid c. temporalis d. digastric e. masseter

e. masseter