Question 1

Muscle fascicles are separated by

Accepted Answer

A)  endomysium.
B)  perimysium.
C)  epimysium.
D)  sarcolemma.
E)  periosteum.

Question 2

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

Accepted Answer

A)  deltoid
B)  trapezius
C)  brachialis
D)  triceps brachii
E)  biceps brachii

Question 3

"Anaerobic endurance"

Accepted Answer

A)  is used during long, slow athletic activities.
B)  is exemplified by contractions of fast muscle fibers.
C)  is determined by the availability of carbohydrates, lipids, or amino acids for breakdown.
D)  is the length of time a muscle can continue to contract while supported by mitochondrial activities.
E)  does not promote muscle hypertrophy.

Question 4

Which of the following inserts into the intertubercular groove of the humerus and acts to extend, adduct, and rotate the shoulder?

Accepted Answer

A)  supraspinatus
B)  latissimus dorsi
C)  serratus anterior
D)  triceps brachii
E)  trapezius B

Question 5

Which of the following is a muscle of the rotator cuff?

Accepted Answer

A)  trapezius
B)  teres major
C)  deltoid
D)  teres minor
E)  coracobrachialis

Question 6

Which muscle is not part of the rotator cuff set of muscles?

Accepted Answer

A)  supraspinatus
B)  subscapularis
C)  teres minor
D)  biceps brachii
E)  teres major

Question 7

The difference in the action when comparing the biceps brachii to the flexor carpi radialis, is

Accepted Answer

A)  one muscle flexes the hand at the wrist and the other flexes the entire forearm.
B)  one muscle flexes the arm and the other extends the arm.
C)  one moves the ulna and the other moves the radius.
D)  one of these muscles is voluntary while the other is involuntary.
E)  the shapes of the two muscles differ. A

Question 8

Looking at the muscle name sternocleidomastoid, you would identify that this muscle is located in the area of the

Accepted Answer

A)  leg.
B)  neck.
C)  back.
D)  abdomen.
E)  arm.

Question 9

Because Mary wants to enter a marathon, she decides to consult a trainer who happens to be a kinesiologist. The trainer advises her on what type of muscle fibers she needs to develop and how she should train for it. Which type of muscle fibers are involved? Briefly explain the anatomy and physiology of the trainer's advice.

Accepted Answer

As marathons require aerobic endurance, ...

Question 10

Figure 7-1 Structural Components of a Skeletal Muscle Fiber
Use Figure 7-1 to identify the labeled part.
-The triad, seen as structure D, is composed of

Accepted Answer

A)  the T tubules and the myofibrils.
B)  actin and myosin.
C)  troponin and tropomyosin.
D)  the cisterna of the sarcoplasmic reticulum along with the T tubules.
E)  the cisterna of the sarcoplasmic reticulum and the myofilaments.

Question 11

Tom is having difficulty dorsiflexing and inverting his right foot. Which muscle is most likely involved in this problem?

Accepted Answer

A)  tibialis anterior
B)  soleus
C)  gastrocnemius
D)  flexor digitorum
E)  plantaris

Question 12

Which of the following is a muscle that originates from the zygomatic arch and functions in elevating the mandible?

Accepted Answer

A)  masseter
B)  frontalis
C)  digastric
D)  temporalis
E)  medial pterygoid

Question 13

The muscle that dorsiflexes the foot is the

Accepted Answer

A)  tibialis anterior.
B)  tibialis posterior.
C)  soleus.
D)  peroneus.
E)  gastrocnemius.

Question 14

The muscle that originates from the superior surface of the pubis around the symphysis is the

Accepted Answer

A)  internal oblique.
B)  external oblique.
C)  rectus abdominis.
D)  transversus abdominis.
E)  diaphragm.

Question 15

Which muscle inserts on the clavicle and the acromion and spine of the scapula?

Accepted Answer

A)  serratus anterior
B)  levator scapulae
C)  sternocleidomastoid
D)  pectoralis minor
E)  trapezius

Question 16

Each myofibril consists of approximately ________ sarcomeres.

Accepted Answer

A)  10
B)  500
C)  10,000
D)  100,000
E)  2-3 million

Question 17

A resting muscle generates most of its ATP by

Accepted Answer

A)  conversion of creatine phosphate.
B)  anaerobic respiration.
C)  aerobic respiration.
D)  glycolysis.
E)  heat loss.

Question 18

The ________ contains vesicles filled with acetylcholine.

Accepted Answer

A)  axon terminal
B)  motor end plate
C)  neuromuscular junction
D)  synaptic cleft
E)  transverse tubule

Question 19

The skeletal muscles store calcium ions in the terminal cisternae of the

Accepted Answer

A)  sarcolemma.
B)  sarcomere.
C)  sarcosome.
D)  sarcoplasmic reticulum.
E)  sarcoplasm.

Question 20

Choose the correct statement regarding motor units.

Accepted Answer

A)  Muscle fibers of each motor unit are not mingled with those of other motor units.
B)  During a sustained contraction, all motor units are activated simultaneously.
C)  A motor neuron may control only two or three muscle fibers of the eye muscle(s) .
D)  When muscles contract for sustained periods, maximal tension is maintained.
E)  Most motor neurons control fewer than five muscle fibers. C

Exam 7: The Muscular System

Muscle fascicles are separated by

Correct Answer
verified

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

Correct Answer
verified

"Anaerobic endurance"

Correct Answer
verified

Which of the following inserts into the intertubercular groove of the humerus and acts to extend, adduct, and rotate the shoulder?

Correct Answer
verified
B

Which of the following is a muscle of the rotator cuff?

Correct Answer
verified

Which muscle is not part of the rotator cuff set of muscles?

Correct Answer
verified

The difference in the action when comparing the biceps brachii to the flexor carpi radialis, is

Correct Answer
verified
A

Looking at the muscle name sternocleidomastoid, you would identify that this muscle is located in the area of the

Correct Answer
verified

Correct Answer
verified
As marathons require aerobic endurance, ...
View Answer

Figure 7-1 Structural Components of a Skeletal Muscle Fiber Use Figure 7-1 to identify the labeled part. -The triad, seen as structure D, is composed of

Correct Answer
verified

Tom is having difficulty dorsiflexing and inverting his right foot. Which muscle is most likely involved in this problem?

Correct Answer
verified

Which of the following is a muscle that originates from the zygomatic arch and functions in elevating the mandible?

Correct Answer
verified

The muscle that dorsiflexes the foot is the

Correct Answer
verified

The muscle that originates from the superior surface of the pubis around the symphysis is the

Correct Answer
verified

Which muscle inserts on the clavicle and the acromion and spine of the scapula?

Correct Answer
verified

Each myofibril consists of approximately ________ sarcomeres.

Correct Answer
verified

A resting muscle generates most of its ATP by

Correct Answer
verified

The ________ contains vesicles filled with acetylcholine.

Correct Answer
verified

The skeletal muscles store calcium ions in the terminal cisternae of the

Correct Answer
verified

Choose the correct statement regarding motor units.

Correct Answer
verified
C

Exam 7: The Muscular System

Muscle fascicles are separated by

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

"Anaerobic endurance"

Correct AnswerverifiedShow Answer

Which of the following inserts into the intertubercular groove of the humerus and acts to extend, adduct, and rotate the shoulder?

Correct AnswerverifiedB

Which of the following is a muscle of the rotator cuff?

Correct AnswerverifiedShow Answer

Which muscle is not part of the rotator cuff set of muscles?

Correct AnswerverifiedShow Answer

The difference in the action when comparing the biceps brachii to the flexor carpi radialis, is

Correct AnswerverifiedA

Looking at the muscle name sternocleidomastoid, you would identify that this muscle is located in the area of the

Correct AnswerverifiedShow Answer

Correct AnswerverifiedAs marathons require aerobic endurance, ...View AnswerShow Answer

Figure 7-1 Structural Components of a Skeletal Muscle Fiber Use Figure 7-1 to identify the labeled part. -The triad, seen as structure D, is composed of

Correct AnswerverifiedShow Answer

Tom is having difficulty dorsiflexing and inverting his right foot. Which muscle is most likely involved in this problem?

Correct AnswerverifiedShow Answer

Which of the following is a muscle that originates from the zygomatic arch and functions in elevating the mandible?

Correct AnswerverifiedShow Answer

The muscle that dorsiflexes the foot is the

Correct AnswerverifiedShow Answer

The muscle that originates from the superior surface of the pubis around the symphysis is the

Correct AnswerverifiedShow Answer

Which muscle inserts on the clavicle and the acromion and spine of the scapula?

Correct AnswerverifiedShow Answer

Each myofibril consists of approximately ________ sarcomeres.

Correct AnswerverifiedShow Answer

A resting muscle generates most of its ATP by

Correct AnswerverifiedShow Answer

The ________ contains vesicles filled with acetylcholine.

Correct AnswerverifiedShow Answer

The skeletal muscles store calcium ions in the terminal cisternae of the

Correct AnswerverifiedShow Answer

Choose the correct statement regarding motor units.

Correct AnswerverifiedC

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B

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A

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verified
As marathons require aerobic endurance, ...
View Answer

Correct Answer
verified

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Correct Answer
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C