Muscular System

The area between the Z lines is the

sarcomere

Muscles whose names contain the root cervi- would be found in the

neck

Specific name for the plasma membrane of the myofiber

sarcolemma

An olympic long distance marathon winner most likely has an increased number of _____ muscle fibers

slow

A person whose genetic makeup makes him a bettr marathn runner than a sprinter probably has more ____ in his leg muscles

slow fibers

At rest, active sites of the actin are covered by

tropomyosin

the following describes _____ type of seletal muscle fibers

Fast

The origon of the soleus is ______ and the insertion is

Fibula/Tibia; calcaneus

Which of the following muscles acts to flex the finger joints and wrist?

Flexor digitorium

Tibialis anterior

Gastrocnemius

Which statement regarding "heat loss" is true?

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

____ allows for electrical stimula sent from the brain to reach deep into each fiber

T Tubules

Skeletal muscle fibers differ from "typical cells" in that these muscle fivers

The name of the cytoplasm is sarcoplasm in the muscle cell

Which of the following is an effect of aging on the muscular system?

Tolerance for exercise decreases

Highlighted muscle

Trapezius

Biceps brachii

Triceps Brachii

Which muscle extends the elbow during the action of push-ups?

Triceps brachii

______ moves away from the active sites

Tropomyosin

What creates "cross-bridges"

When the myosin heads bind to the active sites

Muscles dominated by fast fibers appear

White

Name of the areas circled in black

Z lines

The deltoid acts to

abduct the arm

Myofibrils are made primarily of

actin and myosin

The striated appearance of skeletal muscle results from

actin and myosin arrangement on the sarcomere

Which of the following terms is a descripive word for a muscle's action?

adductor

Which of the following terms is a descriptive word for a muscle's action?

adductor

A muscle _______ contains a sarcolemma, sacroplasm and myofibrils

fiber

What is the indicated structure?

Aponeruosis

Laissimus dorsi

Deltoid

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

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

Match the muscle with it's action from the list below: 1. Rectus Femoris 2. Biceps Femoris 3. Gastrocnemius 4. Masseter

1. Extends leg at the knee 2. Flexes leg a the knee 3. Extension at the ankle 4. Elevates the mandible

Match origin with 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/ulna 6. Illium 7.Femur 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 radialis 6. Sternoclemastoid 7. Tibialis anterior

1. Superior border next o the rib 2. Mandible 3. Humerus 4. Biceps brachii. 5. Metacarpal 6. Mastoid of skull 7. Flexion at ankle

Match the following terms correctly 1. Actin 2. Myosin 3. Tendon 4. Aponeruosis

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

Match with corresponding muscle (front) A. B. C.

A. Pectoralis Major B. Trapezius C. Rectus Femoris

Match that backside A. B. C. D. E.

A. Semitendinosus B. Latissimus dorsi C. Gluteus Maximus D. Deltoid E. Triceps Brachii

Match the letter on the diagram with the correct structure name

A. Tendon B. Epimysium E.Perimysium D. Endomysium

Which filament is a thin twisted protein that contains specific active sites?

Actin

What type of endurance is gained from performing increased amounts of brief, intense woorkoutsm, such as sprinting or weightlighting?

Anaerobic endurance

Smaller and weaker; Term used when this occurs to muscle is

Atrophy

the muscle that flexes the knee

Biceps femoris

Rigor mortis occurs at death due to a lack of

Blood circulation to move Calcium ions out of the cell

How to skletal muscles produce movement?

By pulling on tendons tha then moves bones

After a contraction, the sarcomere will return to a resting state; which is

Calcium ions deplete and troponin confirmation returns

Active muscles generate

Carbon dioxide and heat

Which of the following is characteristic of cardiac muscle?

Cardiac muscle cells are involuntary

Afer death, rigor mortis lasts until

Decomposition begins

Which of the following muscles is named for its shape?

Deltoid

The muscle that adducts the shoulder is the

Deltoid.

Which of the following describes the acion of the trapezius?

Elevates, adducts, depresses, or rotates the scapula

A layer of collagen fibers that surrounds an entire muscle is called

Epimysium

Tensor fasciae latae

Gluteus maximus

Which muscle has an action of hip extension

Gluteus maximus

Consider the Sliding Filamen theory: Observed changes in the sarcomere. Which band or line gets smaller during a muscle contraction?

I band

External intercostals

Internal intercostals

Diagastric

Masseter

Choose the 3 muscles that make up the hamstring group

Semitendinosus Semitendinosus Biceps Femoris

Which of the following statemens describes how muscles help maintain homeostasis?

Skeletal muscle contraciosn help maintain body temperature.

Which statement regarding skeletal muscle is true?

Skeletal muscles contain blood vessels

The following describes ______ fibers -Contains increased amount of capillary networks, providing oxygen -Contains a red pigment called myoaglobin -Contains oxygen reserves -Contain a relatively larger number of mitochondria than do fast muscle fibers

Slow

Nonstriated, involuntary muscle is

Smooth

The muscle that inserts with the gastrocnemius to the calcaneus, via the calcaneal tendon, is the

Soleus

What muscle types guard the entrance and exits of the body?

Sphincters

Which of the following acts to flex the neck?

Sternocleidomastoid

Pectoralis Major

Supra spinatus

______ is the abductor of the shoulder

Supraspinatus

In infants, which muscle produces suction for suckling at the breast?

buccinator

the muscle that compresses the cheeks, as when pursing the lips and blowing forcefully, is the

buccinator

The supraspinatus assists the _________ muscle.

deltoid

Muscle used for inhalation of breath

diaphragm

Anerobic endurance

it used during long, slow athletic activities

A muscle that originates from the zygomatic arch and functions in elevating the mandible?

masseter

The less-movable end of a skeletal muscle is the

origin

A sheath of connective tissue surrounding a bundle of striated muscle fibers is called

perimysium

Which muscle inserts on the clavicle and scapula?

trapezius