Question 1

Neurotransmitters are released upon stimulation from a nerve impulse from the ________.

Accepted Answer

A)   myofibrils
B)   sarcoplasmic reticulum
C)   thick filaments
D)   axon terminals of the motor neuron
E)   sarcolemma of the muscle cellF) D) and E)
G) A) and B)

Question 2

Using Figure 6.2, match the following:
-The endomysium that wraps individual muscle fibers is indicated by ________.

Accepted Answer

A)   Label A
B)   Label B
C)   Label C
D)   Label DE) A) and D)
F) A) and C)

Question 3

Skeletal muscle, as a whole, can generate different amounts of force, and different degrees of shortening, in response to stimuli. What is this concept called?

Accepted Answer

A)   graded response
B)   twitch
C)   fused, or complete, tetanus
D)   incomplete, or unfused, tetanus
E)   action potentialF) C) and D)
G) B) and D)

Question 4

Which movement is opposite to abduction?

Accepted Answer

A)   flexion
B)   rotation
C)   circumduction
D)   adduction
E)   supinationF) A) and B)
G) B) and E)

Question 5

Like the biceps brachii muscle, which muscle is a prime mover in elbow flexion?

Accepted Answer

A)   triceps brachii
B)   deltoid
C)   brachioradialis
D)   fibularis longus
E)   brachialisF) D) and E)
G) B) and C)

Question 6

The arrangement of fascicles in orbicularis oris is ________.

Accepted Answer

A)   circular
B)   convergent
C)   pennate
D)   fusiformE) All of the above
F) B) and C)

Question 7

Using Figure 6.1, match the following:
-The A band within a myofibril is indicated by ________.

Accepted Answer

A)   Label A
B)   Label B
C)   Label C
D)   Label DE) B) and D)
F) A) and B)

Question 8

Why are calcium ions necessary for skeletal muscle contraction?

Accepted Answer

A)   Calcium ions increase the speed of the action potential transmitted along the sarcolemma.
B)   Calcium ions release the inhibition on Z discs.
C)   Calcium ions trigger the binding of myosin heads to actin filaments.
D)   Calcium ions cause ATP binding to actin.
E)   Calcium ions bind to regulatory proteins on the myosin filaments, changing both their shape and their position on the thick filaments.F) B) and E)
G) C) and D)

Question 9

Which of the following consists of two large, flat muscles that cover the lower back?

Accepted Answer

A)   deltoid
B)   biceps brachii
C)   triceps brachii
D)   latissimus dorsi
E)   pectoralis majorF) A) and D)
G) A) and B)

Question 10

Match the following:
-Performs very slow, sometimes rhythmic, contractions

Accepted Answer

A)  smooth muscle tissue
B)  cardiac muscle tissue
C)  skeletal muscle tissueD) B) and C)
E) A) and C)

Question 11

Match the following:
-Muscle tissue that is multinucleate

Accepted Answer

A)  smooth muscle tissue
B)  cardiac muscle tissue
C)  skeletal muscle tissueD) B) and C)
E) A) and C)

Question 12

Muscles will hypertrophy if they are not used continually.

Accepted Answer

A) True 
 B)False

Question 13

The deepest muscle of the abdominal wall is the transversus abdominis.

Accepted Answer

A) True 
 B)False

Question 14

A sarcomere is ________.

Accepted Answer

A)   the nonfunctional unit of skeletal muscle
B)   the contractile unit between two Z discs
C)   the area between two intercalated discs
D)   the wavy lines on the cell, as seen in a microscope
E)   a compartment in a myofilamentF) D) and E)
G) C) and D)

Question 15

What is covered by the endomysium?

Accepted Answer

A)   fascicles of muscle cells
B)   an entire muscle
C)   an individual muscle cell
D)   myofibrils
E)   smooth muscle onlyF) A) and B)
G) A) and C)

Question 16

Which of the following is a type isometric exercise in which muscles increase in size and strength?

Accepted Answer

A)   swimming
B)   biking
C)   jogging
D)   lifting weights
E)   dancingF) B) and D)
G) A) and D)

Question 17

Discuss the importance of calcium ions in skeletal muscle contraction.

Accepted Answer

Calcium ions are necessary for myosin he...

Question 18

Which of these muscles is the prime mover of elbow extension?

Accepted Answer

A)   brachialis
B)   latissimus dorsi
C)   deltoid
D)   triceps brachii
E)   biceps brachiiF) B) and D)
G) A) and D)

Question 19

Match the following:
-Muscle tissue found only in the heart

Accepted Answer

A)  smooth muscle tissue
B)  cardiac muscle tissue
C)  skeletal muscle tissueD) A) and B)
E) None of the above

Question 20

Plantar flexion at the ankle joint is accomplished by the tibialis anterior muscle.

Accepted Answer

A) True 
 B)False

Exam 6: The Muscular System

The arrangement of fascicles in orbicularis oris is ________.

Correct AnswerverifiedShow Answer

A sarcomere is ________.

Correct AnswerverifiedShow Answer

Which of the following consists of two large, flat muscles that cover the lower back?

Correct AnswerverifiedShow Answer

The deepest muscle of the abdominal wall is the transversus abdominis.

Correct AnswerverifiedShow Answer

Match the following: -Performs very slow, sometimes rhythmic, contractions

Correct AnswerverifiedShow Answer

Using Figure 6.2, match the following: -The endomysium that wraps individual muscle fibers is indicated by ________.

Correct AnswerverifiedShow Answer

Match the following: -Muscle tissue that is multinucleate

Correct AnswerverifiedShow Answer

Plantar flexion at the ankle joint is accomplished by the tibialis anterior muscle.

Correct AnswerverifiedShow Answer

Match the following: -Muscle tissue found only in the heart

Correct AnswerverifiedShow Answer

Skeletal muscle, as a whole, can generate different amounts of force, and different degrees of shortening, in response to stimuli. What is this concept called?

Correct AnswerverifiedShow Answer

Why are calcium ions necessary for skeletal muscle contraction?

Correct AnswerverifiedShow Answer

What is covered by the endomysium?

Correct AnswerverifiedShow Answer

Which movement is opposite to abduction?

Correct AnswerverifiedShow Answer

Using Figure 6.1, match the following: -The A band within a myofibril is indicated by ________.

Correct AnswerverifiedShow Answer

Like the biceps brachii muscle, which muscle is a prime mover in elbow flexion?

Correct AnswerverifiedShow Answer

Neurotransmitters are released upon stimulation from a nerve impulse from the ________.

Correct AnswerverifiedShow Answer

Muscles will hypertrophy if they are not used continually.

Correct AnswerverifiedShow Answer

Discuss the importance of calcium ions in skeletal muscle contraction.

Correct AnswerverifiedCalcium ions are necessary for myosin he...View AnswerShow Answer

Which of these muscles is the prime mover of elbow extension?

Correct AnswerverifiedShow Answer

Which of the following is a type isometric exercise in which muscles increase in size and strength?

Correct AnswerverifiedShow Answer

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Calcium ions are necessary for myosin he...
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