Question 1

The smallest functional units of the muscle fibers are the ________.

Accepted Answer

The answer of The smallest functional units of the muscle...

Question 2

Due to lack of use, a muscle will lose size, tone, and power through the process of

Accepted Answer

A)  hypertrophy.
B)  recruitment.
C)  atrophy.
D)  reduced tone.
E)  None of the answers are correct.

Question 3

Electrical changes that occur in the membranes of the T tubules cause release of ________ ions from the sarcoplasmic reticulum.

Accepted Answer

The answer of Electrical changes that occur in the membranes...

Question 4

Figure 9.3
  
Using the figure above, identify the labeled part.
-Label O: ______________________________

Accepted Answer

Sarcolemma...

Question 5

Slow twitch fibers appear red due to the intracellular storage of

Accepted Answer

A)  myoglobin.
B)  blood.
C)  hemoglobin.
D)  glycogen.
E)  All of the answers are correct.

Question 6

Figure 9.3
  
Using the figure above, identify the labeled part.
-Label F: ______________________________

Accepted Answer

The answer of Figure 9.3
  
Using the figure above,...

Question 7

Figure 9.4
  
Using the figure above, identify the labeled part.
-Label E: ______________________________

Accepted Answer

The answer of Figure 9.4
  
Using the figure above,...

Question 8

What is the significance of the change in permeability of the sarcolemma in muscle contraction

Accepted Answer

A)  It has no role, because this phenomenon does not occur.
B)  It causes the release of calcium ions.
C)  This change is caused by a neurotransmitter.
D)  This change is caused by the displacement of actin and myosin molecules.
E)  None of the answers are correct.

Question 9

All of the muscle fibers within a single motor unit are of the ________ type(s).

Accepted Answer

The answer of All of the muscle fibers within a...

Question 10

How is muscle contraction regulated by tropomyosin and troponin

Accepted Answer

Tropomyosin molecules form a long chain ...

Question 11

The function of T tubules is to

Accepted Answer

A)  bind muscle fibers together at the neuromuscular synapse.
B)  separate one muscle fiber from another to facilitate partial contraction of a muscle.
C)  help distribute the electrical signal to contract throughout the muscle fiber.
D)  bind actin and myosin molecules together.
E)  None of the answers are correct.

Question 12

The portion of a sarcomere that contains the thick filaments and the zone of overlap is the

Accepted Answer

A)  I band.
B)  M line.
C)  A band.
D)  H band.
E)  Z line.

Question 13

A pair of forceps grasping an object involves the use of the principle of a ________ lever.

Accepted Answer

The answer of A pair of forceps grasping an object...

Question 14

Figure 9.1
  
Using the figure above, identify the labeled part.
-Label K: ______________________________

Accepted Answer

The answer of Figure 9.1
  
Using the figure above,...

Question 15

Slow muscle fibers

Accepted Answer

A)  are about two-thirds the diameter of fast fibers.
B)  take twice as long to contract after stimulation as do fast fibers.
C)  can continue to contract long after fast fibers have fatigued.
D)  have less oxygen than do fast fibers.
E)  None of the answers are correct.

Question 16

Light staining areas of a muscle fiber are called I bands.

Accepted Answer

A) True 
 B)False

Question 17

All the muscle fibers controlled by a single motor neuron constitute a

Accepted Answer

A)  sarcomere.
B)  tendon organ.
C)  motor unit.
D)  skeletal muscle.
E)  synaptic knob.

Question 18

All of the motor units of the muscle contracting at the maximal rate of stimulation causes the production of

Accepted Answer

A)  the longest contraction.
B)  the fastest contraction.
C)  multiple motor unit summation.
D)  peak tension.
E)  fast, long contractions.

Question 19

Increased cytosolic ________ concentrations are necessary for muscular contractions to occur properly.

Accepted Answer

The answer of Increased cytosolic ________ concentrations are necessary for...

Question 20

Why does a sarcomere appear to be banded, and of what are the bands composed

Accepted Answer

The differences in the size and density ...

Exam 9: The Muscular System: Skeletal Muscle Tissue and Muscle Organization

Light staining areas of a muscle fiber are called I bands.

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Figure 9.3 Using the figure above, identify the labeled part. -Label F: ______________________________

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Electrical changes that occur in the membranes of the T tubules cause release of ________ ions from the sarcoplasmic reticulum.

Correct AnswerverifiedShow Answer

The portion of a sarcomere that contains the thick filaments and the zone of overlap is the

Correct AnswerverifiedShow Answer

Figure 9.3 Using the figure above, identify the labeled part. -Label O: ______________________________

Correct AnswerverifiedSarcolemma...View AnswerShow Answer

Figure 9.4 Using the figure above, identify the labeled part. -Label E: ______________________________

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Slow twitch fibers appear red due to the intracellular storage of

Correct AnswerverifiedShow Answer

A pair of forceps grasping an object involves the use of the principle of a ________ lever.

Correct AnswerverifiedShow Answer

How is muscle contraction regulated by tropomyosin and troponin

Correct AnswerverifiedTropomyosin molecules form a long chain ...View AnswerShow Answer

All the muscle fibers controlled by a single motor neuron constitute a

Correct AnswerverifiedShow Answer

All of the muscle fibers within a single motor unit are of the ________ type(s).

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All of the motor units of the muscle contracting at the maximal rate of stimulation causes the production of

Correct AnswerverifiedShow Answer

Due to lack of use, a muscle will lose size, tone, and power through the process of

Correct AnswerverifiedShow Answer

Why does a sarcomere appear to be banded, and of what are the bands composed

Correct AnswerverifiedThe differences in the size and density ...View AnswerShow Answer

Slow muscle fibers

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Increased cytosolic ________ concentrations are necessary for muscular contractions to occur properly.

Correct AnswerverifiedShow Answer

The smallest functional units of the muscle fibers are the ________.

Correct AnswerverifiedShow Answer

The function of T tubules is to

Correct AnswerverifiedShow Answer

What is the significance of the change in permeability of the sarcolemma in muscle contraction

Correct AnswerverifiedShow Answer

Figure 9.1 Using the figure above, identify the labeled part. -Label K: ______________________________

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Sarcolemma...
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Tropomyosin molecules form a long chain ...
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The differences in the size and density ...
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