Question 1

During resting conditions, _________ is synthesized to store energy?

Accepted Answer

A)   calcium
B)   creatine phosphate
C)   creatine
D)   lactic acid
E)   pyruvic acidF) A) and E)
G) All of the above

Question 2

A stimulus either causes an action potential or it doesn't. This is called

Accepted Answer

A)   an all-or-none response.
B)   a graded response.
C)   a latent period response.
D)   a relative refractory response.
E)   an arbitrary response.F) None of the above
G) A) and E)

Question 3

Troponin

Accepted Answer

A)   has two subunits.
B)   is part of the myosin myofilament.
C)   is a long, flexible protein.
D)   has a calcium-binding site.
E)   binds to ATP.F) All of the above
G) D) and E)

Question 4

What type of muscle tissue causes peristalsis?

Accepted Answer

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

Question 5

Which type of muscle tissue has spindle-shaped cells?

Accepted Answer

A)   skeletal muscle
B)   smooth muscle
C)   cardiac muscle
D)   both skeletal and cardiac muscle
E)   both cardiac and smooth muscleF) A) and E)
G) All of the above

Question 6

A sarcomere extends from

Accepted Answer

A)   one Z disk to an adjacent Z disk.
B)   one T tubule to the next T tubule.
C)   the middle of the I band to the middle of the A band.
D)   the H zone to the I band.
E)   the M line to the next M line.F) A) and D)
G) C) and D)

Question 7

You are hired to work in a laboratory to measure the rate of human muscle contraction. Which of the following might decrease in quantity in muscle cells undergoing contractions?

Accepted Answer

A)   ATP
B)   carbon dioxide
C)   water
D)   lactic acid
E)   sodiumF) B) and D)
G) A) and B)

Question 8

A waste product of anaerobic respiration in muscle cells is

Accepted Answer

A)   uric acid.
B)   hydrochloric acid.
C)   lactic acid.
D)   carbonic acid.
E)   pyruvic acid.F) B) and C)
G) A) and E)

Question 9

Which type of muscle tissue is autorhythmic?

Accepted Answer

A)   skeletal muscle
B)   smooth muscle
C)   cardiac muscle
D)   both skeletal and cardiac muscle
E)   both cardiac and smooth muscleF) A) and D)
G) B) and E)

Question 10

An eccentric contraction is described as

Accepted Answer

A)   action potential frequency is high enough that no relaxation of muscle fibers occurs.
B)   a muscle produces constant tension during contraction.
C)   a muscle produces an increasing tension during contraction.
D)   a muscle produces increasing tension as it shortens.
E)   a muscle produces tension, but the length of the muscle is increasing.F) D) and E)
G) B) and C)

Question 11

The electrical properties of cells are the result of

Accepted Answer

A)   ion concentration differences across the plasma membrane.
B)   receptor sites that are present on the plasma membrane.
C)   phosphorylation reactions within the cytoplasm.
D)   phospholipids in the cell membrane.
E)   None of these choices is correct.F) B) and E)
G) A) and B)

Question 12

Incomplete tetanus

Accepted Answer

A)   is the time during which the tissue cannot respond again.
B)   results in complete and incomplete tetanus.
C)   is the condition in which the muscle fiber only partially relaxes between contractions.
D)   is the condition in which stimuli occur so rapidly that there are no intervening relaxations.
E)   is the constant tension produced by muscles for long periods of time.F) C) and D)
G) B) and D)

Question 13

-The figure illustrates a detailed drawing of the neuromuscular junction. What does "C" represent?

Accepted Answer

A)   synaptic vesicles
B)   synaptic cleft
C)   sarcolemma
D)   presynaptic terminal
E)   postsynaptic membraneF) D) and E)
G) C) and D)

Question 14

Which of the following actions is caused by contraction of skeletal muscle?

Accepted Answer

A)   contraction of the heart
B)   moving your feet in walking
C)   movement of food through the digestive tract
D)   emptying of the urinary bladder
E)   vasoconstrictionF) B) and E)
G) C) and D)

Question 15

Treppe

Accepted Answer

A)   can contribute to improved muscle efficiency.
B)   may be due to an increase in the level of calcium ions around the myofibril.
C)   is an example of a graded response.
D)   is achieved during warm-up exercises.
E)   All of these choices are correct.F) A) and B)
G) A) and E)

Question 16

Muscle myofibrils

Accepted Answer

A)   are found in the sarcolemma.
B)   extend from the sarcolemma to the T-tubule.
C)   contain myosin and actin myofilaments.
D)   hold muscle cells together.
E)   do not appear striated.F) B) and C)
G) C) and D)

Question 17

Which type of respiraiton can use a variety of molecules as energy sources?

Accepted Answer

A)   anaerobic respiration
B)   aerobic respiration
C)   both anaerobic and aerobic respirationD) B) and C)
E) A) and C)

Question 18

Select the term that does not belong with the others.

Accepted Answer

A)   muscle atrophy
B)   immobilization
C)   decrease in number of myofibrils
D)   loss of nerve stimulation
E)   increased vascularityF) A) and B)
G) A) and C)

Question 19

Which type of muscle tissue possesses striations?

Accepted Answer

A)   skeletal muscle
B)   smooth muscle
C)   cardiac muscle
D)   both skeletal and cardiac muscle
E)   both cardiac and smooth muscleF) B) and D)
G) All of the above

Question 20

-What does "D" 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) A) and C)

Exam 9: Muscular System: Histology and Physiology

During resting conditions, _________ is synthesized to store energy?

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-What does "D" represent on the diagram?

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Select the term that does not belong with the others.

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Treppe

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Which type of muscle tissue possesses striations?

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What type of muscle tissue causes peristalsis?

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Troponin

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A sarcomere extends from

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Which type of muscle tissue is autorhythmic?

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Which of the following actions is caused by contraction of skeletal muscle?

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A stimulus either causes an action potential or it doesn't. This is called

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A waste product of anaerobic respiration in muscle cells is

Correct AnswerverifiedShow Answer

Which type of respiraiton can use a variety of molecules as energy sources?

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-The figure illustrates a detailed drawing of the neuromuscular junction. What does "C" represent?

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An eccentric contraction is described as

Correct AnswerverifiedShow Answer

You are hired to work in a laboratory to measure the rate of human muscle contraction. Which of the following might decrease in quantity in muscle cells undergoing contractions?

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Muscle myofibrils

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Which type of muscle tissue has spindle-shaped cells?

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The electrical properties of cells are the result of

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Incomplete tetanus

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