Question 1

The diffusion of calcium ions into a smooth muscle cell does not depolarize the membrane so no action potential occurs.

Accepted Answer

A) True 
 B)False

Question 2

Skeletal muscle develops from multinucleated cells called

Accepted Answer

A)  fascicles.
B)  myoblasts.
C)  myofibrils.
D)  myotomes.
E)  fasciculi.F) C) and D)
G) A) and E)

Question 3

Lack of acetylcholinesterase in the synaptic cleft would result in

Accepted Answer

A)  a decrease in acetylcholine production by the motor neuron.
B)  continuous stimulation of the postsynaptic membrane.
C)  rapid degradation of acetylcholine.
D)  relaxation of the muscle.
E)  continuous stimulation of the presynaptic membrane.F) C) and D)
G) A) and B)

Question 4

-What does "C" represent on the diagram?

Accepted Answer

A)  threshold
B)  depolarization
C)  depolarization phase of action potential
D)  repolarization phase of action potentialE) A) and B)
F) B) and C)

Question 5

A drug that interferes with the active transport of calcium ions from the sarcoplasm back into the sarcoplasmic reticulum would result in

Accepted Answer

A)  relaxation of the muscle fiber.
B)  contraction with no relaxation.
C)  muscle hypertrophy.
D)  fibrosis of the muscle.
E)  an imbalance of blood calcium.F) A) and C)
G) A) and B)

Question 6

The outside of the resting plasma membrane is __________ relative to the inside of the resting plasma membrane.

Accepted Answer

A)  positively charged
B)  negatively charged
C)  electrically neutral
D)  recharged
E)  None of these choices is correct.F) C) and D)
G) A) and C)

Question 7

The sarcoplasmic reticulum

Accepted Answer

A)  stores calcium ions.
B)  shortens during muscle contraction.
C)  transmits nerve impulses to the myofibrils.
D)  connects adjacent sarcomeres.
E)  covers the muscle fiber.F) All of the above
G) A) and C)

Question 8

Which of the following is NOT a function of skeletal muscle?

Accepted Answer

A)  body movement
B)  maintenance of posture
C)  respiration
D)  constriction of organs
E)  production of heatF) A) and B)
G) C) and E)

Question 9

A sarcomere is the

Accepted Answer

A)  cell membrane of a muscle fiber.
B)  cytoplasm of muscle cells.
C)  structural and functional unit of the skeletal muscle cell.
D)  contractile thread that extends the length of the muscle fiber.
E)  protein strand composed of actin or myosin.F) A) and B)
G) B) and E)

Exam 9: Muscular System: Histology and Physiology

A drug that interferes with the active transport of calcium ions from the sarcoplasm back into the sarcoplasmic reticulum would result in

Correct Answer
verified

A sarcomere is the

Correct Answer
verified

-What does "C" represent on the diagram?

Correct Answer
verified

Which of the following is NOT a function of skeletal muscle?

Correct Answer
verified

The diffusion of calcium ions into a smooth muscle cell does not depolarize the membrane so no action potential occurs.

Correct Answer
verified

The sarcoplasmic reticulum

Correct Answer
verified

The outside of the resting plasma membrane is __________ relative to the inside of the resting plasma membrane.

Correct Answer
verified

Lack of acetylcholinesterase in the synaptic cleft would result in

Correct Answer
verified

Skeletal muscle develops from multinucleated cells called

Correct Answer
verified

Exam 9: Muscular System: Histology and Physiology

A drug that interferes with the active transport of calcium ions from the sarcoplasm back into the sarcoplasmic reticulum would result in

Correct AnswerverifiedShow Answer

A sarcomere is the

Correct AnswerverifiedShow Answer

-What does "C" represent on the diagram?

Correct AnswerverifiedShow Answer

Which of the following is NOT a function of skeletal muscle?

Correct AnswerverifiedShow Answer

The diffusion of calcium ions into a smooth muscle cell does not depolarize the membrane so no action potential occurs.

Correct AnswerverifiedShow Answer

The sarcoplasmic reticulum

Correct AnswerverifiedShow Answer

The outside of the resting plasma membrane is __________ relative to the inside of the resting plasma membrane.

Correct AnswerverifiedShow Answer

Lack of acetylcholinesterase in the synaptic cleft would result in

Correct AnswerverifiedShow Answer

Skeletal muscle develops from multinucleated cells called

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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