Muscle Quiz

8/4/2019 Muscle Quiz

1/10

Select the trait that does not characterize muscle tissue in general.

A) irritability

B) contractility

C) extensibility

D) All of these are traits of muscle.

2

In the wrist and ankle, entire groups of tendons are enclosed by a strong band of connective tissue

called a _______________.

A) retinaculum

B) tendon sheath

C) aponeurosis

D) ligament

3

Individual fibers of skeletal muscle have fine sheath of connective tissue called a(n) ________________.

A) epimysium

B) perimysium

C) endomysium

D) fascia

4

Sarcomeres run from _________________.

A) A band to A band

B) Z line to Z line

C) H zone to H zone


2/10

D) I band to I band

5

What portion of the neuromuscular junction initially contains the neurotransmitter acetylcholine?

A) motor end plate

B) synaptic vesicles

C) neuromuscular cleft

D) None of these is correct.

6

Choose the muscle that is not a muscle of mastication.

A) masseter

B) temporalis

C) medial pterygoid

D) orbicularis oculi

7

What muscle has its origin on the sternum and inserts on the mastoid process of the temporal bone?

A) sternocleiodomastoid

B) splenius capitis

C) semispinalis capitis

D) trapezius

8

What is the deepest of the four abdominal muscles?


3/10

A) rectus abdominis

B) external abdominal oblique

C) transversus abdominis

D) internal abdominal oblique

9

The trapezius, levator scapulae, and _______________ are the three muscles of the posterior group that

act on the pectoral girdle.

A) serratus anterior

B) pectoralis minor

C) subclavius

D) rhomboideus

10

What is the insertion of the triceps brachii?

A) lateral epicondyle of humerus

B) olecranon of ulna

C) coronoid process of ulna

D) radial tuberosity

11

The ______________ muscle is a deep, lateral muscle of the forearm that flexes the thumb joints and

assists in grasping.

A) flexor pollicis longus

B) flexor carpi ulnaris

C) superficial digital flexor


4/10

D) deep digital flexor

12

The thenar and hypothenar muscles are located where?

A) in the foot

B) within the hand

C) in the forearm

D) in the lower leg

13

Which of these muscles is an adductor?

A) gluteus medius

B) tensor fascia lata

C) pectineus

D) iliacus

14

Choose the muscle that does not belong to the quadriceps femoris group of the anterior thigh.

A) rectus femoris

B) vastus lateralis

C) vastus medialis

D) biceps femoris


5/10


6/10

5 Unlike cardiac and smooth muscle, skeletal muscle

a. contains myosin.b. must be stimulated by nerve endings to initiate contraction.c. contains actin.d. contains capillaries.

6 A sarcomere is part of a

a. perimysium.b. myofibril.c. myofilament.d. endomysium.

7 The epimysium is

a. is a fibrous connective tissue that wraps bundles of fibers called fascicles.b. the fine sheath of connective tissue that surrounds individual muscle fibers.c. is the overcoat of dense irregular connective tissue that surrounds the whole muscle.d. the strap of dense connective tissue that attaches muscle to bone.

8 Which of the following statements about "indirect attachments" of muscle is incorrect?

a. The connective tissue wrapping of the muscle extend as an aponeuroses.b. The epimysium of the muscle fuses with the periosteum of the bone.c. The connective tissue wrapping of the muscle extend as a tendon.d. The connective tissue wrapping of the muscle connect the muscle to the fascia of other

muscles.


7/10

9 Which of the following characteristics pertains only to skeletal muscle fibers?

a. They are striated.b. They exhibit rhythmic contraction.c. They contain myoglobin.d. They contain pacemaker cells.e. They are multinucleated because they are produced by the fusion of hundreds of

embryonic cells.

10 The plasma membrane of a muscle cell is known as the

a. perimysium.b. sarcomere.c. sarcoplasm.d. sarcolemma.

11 "Cross bridges" that link between the thick and thin filaments are formed by the

a. globular head of thick filaments.b. tails of myosin filaments.c. globular actin.d. F actin

12 The function of the protein "dystrophin" is to

a. assist the muscle cell to spring back in shape after it has been stretched.b. links the thin filaments to integral proteins.c. helps stiffen the actin core in a thin filament.d. hold the thick filaments in place.


8/10

13 Which of the following is thought to be an autoimmune disease of acetylcholine receptors?

a. Muscular dysthrophyb. Myasthenia gravisc. Fibromyalgiad. Myotonic dystrophy

14 The binding of acetylcholine molecules to acetylcholine receptors would lead to all of the

following except

a. potassium diffuses out of the cell.b. sodium would leave the muscle cell.c. chemically gated ion gates would open.d. the interior of the sarcolemma would become slightly less negative than it was prior to

this event.

15 The refractory period in which the muscle will not contract if stimulated occurs during

__________ of the muscle cell.

a. .depolarization.b. hyperpolarizationc. polarization.d. repolarization.

16 What would happen if the calcium level in the sarcoplasm was kept high?

a. The cell would calcify and die.b. The muscle cell would go into a prolonged refractory period.c. Calcium would be reabsorbed from the bone.d. There would be an increased production of ATP.


9/10

17 What is the cause of rigor mortis?

a. Calcium influx into the cell after death causes rigor mortis.b. Break down of protein in the cell after death.c. High levels of sodium in the cell after death would cause rigor mortis.d. Diffusion of potassium out of the cell after death.

18 The difference in the speed and duration of contraction of a twitch contraction in different

muscles through-out the body is due to the

a. size of a muscle.b. enzyme variations in different muscles.c. location of the muscles.d. direction of the fibers of a muscle.

19 Which of the following would produce a " treppe" effect on muscle contraction?

a. Applying a threshold stimulus.b. Decreasing the intervals between applying the stimulus.c. Applying the same strength stimulus for a long period of time.d. Increasing the strength of the stimulus.

20 In an isotonic eccentric muscle contraction, the muscle generates force as it

a) increases its length.b) decreases its length.c) increases its tone.d) increases its thickness.


10/10

21 The presence of creatine phosphate in the muscle provides

a. additional energy to the contracting muscle.b. additional glucose to the contracting muscle.c. additional blood flow to the contracting muscle.d. additional oxygen to the contracting muscle.

22 Where does 95% of the energy needed for contraction come from during moderate exercise?

a. Anaerobic glycolysisb. creatine phosphatec. ATP provides 95% of energy during moderate exercise.d. lactic acid

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Muscle Quiz