Question 1

Muscular force can be adjusted to match different loads by

Accepted Answer

A)   recruiting larger motor units.
B)   varying the frequency of action potentials in motor neurons.
C)   recruiting more motor units.
D)   A, B, and C
E)   None of the above-muscle contraction is all- or- none.

Question 2

During the recovery period following exercise, all of the following are true, except

Accepted Answer

A)   the muscle actively produces ATP.
B)   heat is generated.
C)   oxygen is consumed at above the resting rate.
D)   lactic acid is removed from muscle cells.
E)   muscle fibers are unable to contract.

Question 3

The advantage of having many nuclei in a skeletal muscle fiber is

Accepted Answer

A)   the ability to store extra DNA for metabolism.
B)   the ability to contract.
C)   the ability to produce more ATP with little oxygen.
D)   the ability to produce large amounts of the muscle proteins needed for growth and repair.
E)   both C and D

Question 4

Figure 9- 2 Muscle Contractions
Use Figure 9- 2 to answer the following questions:
-To produce a contraction similar to the one in graph b) , the muscle

Accepted Answer

A)   must be stimulated to the point of fatigue.
B)   gradually warms up.
C)   must be stimulated again before it has relaxed from the previous stimulation.
D)   is excited by a stimulus of increasing intensity.
E)   is caused to produce isolated twitches.

Question 5

Figure 9- 1 Skeletal Muscle Fiber
Use Figure 9- 1 to answer the following questions:
-Which of the following are found in the structure labeled "3"?

Accepted Answer

A)   actin
B)   tropomyosin
C)   myosin
D)   titin
E)   all of the above

Question 6

Muscle fibers differ from "typical cells" in that muscle fibers

Accepted Answer

A)   are very small.
B)   lack mitochondria.
C)   lack a plasma membrane.
D)   have many nuclei.
E)   both B and C

Question 7

After heavy exercise, if energy reserves in a muscle are depleted, _________occurs.

Accepted Answer

A)   an oxygen debt
B)   tetanus
C)   paralysis
D)   atrophy
E)   treppe

Question 8

Muscle tissue, one of the four basic tissue groups, consists chiefly of cells that are highly specialized for

Accepted Answer

A)   peristalsis.
B)   contraction.
C)   conduction.
D)   cushioning.
E)   any of the above

Question 9

Which of the following statements is false?

Accepted Answer

A)   Skeletal muscle contractions may be summated.
B)   Cardiac muscle contractions cannot be summated.
C)   Cardiac muscle stimulation is neural.
D)   Skeletal muscle stimulation is neural.
E)   Cardiocytes are interconnected through intercalated discs.

Question 10

Triggering of the muscle action potential occurs after

Accepted Answer

A)   the nerve action potential jumps across the neuromuscular junction.
B)   acetylcholine binds to chemically gated channels in the end plate membrane.
C)   acetylcholinesterase binds to receptors on the end plate.
D)   calcium ion binds to channels on the end plate.
E)   Any of the above can produce an action potential in the muscle cell.

Question 11

Figure 9- 2 Muscle Contractions
Use Figure 9- 2 to answer the following questions:
-What is the contraction in graph d)  called?

Accepted Answer

A)   wave summation
B)   complete tetanus
C)   incomplete tetanus
D)   twitch
E)   treppe

Question 12

A thin filament is constructed from actin, tropomyosin, troponin, and nebulin

Accepted Answer

A) True 
 B)False

Exam 9: Muscle Tissue

The advantage of having many nuclei in a skeletal muscle fiber is

Correct Answer
verified

A thin filament is constructed from actin, tropomyosin, troponin, and nebulin

Correct Answer
verified

Muscle fibers differ from "typical cells" in that muscle fibers

Correct Answer
verified

Figure 9- 2 Muscle Contractions Use Figure 9- 2 to answer the following questions: -What is the contraction in graph d) called?

Correct Answer
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After heavy exercise, if energy reserves in a muscle are depleted, _________occurs.

Correct Answer
verified

Figure 9- 2 Muscle Contractions Use Figure 9- 2 to answer the following questions: -To produce a contraction similar to the one in graph b) , the muscle

Correct Answer
verified

Figure 9- 1 Skeletal Muscle Fiber Use Figure 9- 1 to answer the following questions: -Which of the following are found in the structure labeled "3"?

Correct Answer
verified

Muscular force can be adjusted to match different loads by

Correct Answer
verified

Which of the following statements is false?

Correct Answer
verified

During the recovery period following exercise, all of the following are true, except

Correct Answer
verified

Triggering of the muscle action potential occurs after

Correct Answer
verified

Muscle tissue, one of the four basic tissue groups, consists chiefly of cells that are highly specialized for

Correct Answer
verified

Exam 9: Muscle Tissue

The advantage of having many nuclei in a skeletal muscle fiber is

Correct AnswerverifiedShow Answer

A thin filament is constructed from actin, tropomyosin, troponin, and nebulin

Correct AnswerverifiedShow Answer

Muscle fibers differ from "typical cells" in that muscle fibers

Correct AnswerverifiedShow Answer

Figure 9- 2 Muscle Contractions Use Figure 9- 2 to answer the following questions: -What is the contraction in graph d) called?

Correct AnswerverifiedShow Answer

After heavy exercise, if energy reserves in a muscle are depleted, _________occurs.

Correct AnswerverifiedShow Answer

Figure 9- 2 Muscle Contractions Use Figure 9- 2 to answer the following questions: -To produce a contraction similar to the one in graph b) , the muscle

Correct AnswerverifiedShow Answer

Figure 9- 1 Skeletal Muscle Fiber Use Figure 9- 1 to answer the following questions: -Which of the following are found in the structure labeled "3"?

Correct AnswerverifiedShow Answer

Muscular force can be adjusted to match different loads by

Correct AnswerverifiedShow Answer

Which of the following statements is false?

Correct AnswerverifiedShow Answer

During the recovery period following exercise, all of the following are true, except

Correct AnswerverifiedShow Answer

Triggering of the muscle action potential occurs after

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Muscle tissue, one of the four basic tissue groups, consists chiefly of cells that are highly specialized for

Correct AnswerverifiedShow Answer

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