Question 1

What is accomplished by the power stroke?

Accepted Answer

A)  The power stroke cocks the myosin head into its high-energy position.
B)  The power stroke allows the myosin heads to bind to actin.
C)  The power stroke results in myosin heads pulling actin toward the center of the sarcomere.
D)  The power stroke causes the myosin and actin filaments to shorten and contract.

Question 2

Which of the following statements is the most accurate description of the sliding filament mechanism?

Accepted Answer

A)  Z discs slide over the thick and thin filaments.
B)  Thin filaments slide past thick filaments towards the M line.
C)  Thick filaments shorten while thin filaments remain unchanged.
D)  Both thick and thin filaments shorten.

Question 3

The function of the sarcoplasmic reticulum (SR)is to store and release calcium ions.

Accepted Answer

A) True 
 B)False

Question 4

During the recovery period after exercise,we breathe deeper and faster.This increased rate of respiration is known as:

Accepted Answer

A)  oxidative catabolism.
B)  lactic acid buildup.
C)  muscular fatigue.
D)  excess postexercise oxygen consumption (EPO
C)  .

Question 5

What characteristic is NOT descriptive of cardiac muscle tissue?

Accepted Answer

A)  voluntary muscle contractions
B)  located in the heart
C)  intercalated discs
D)  striations

Question 6

A muscle cell experiencing resting membrane potential is:

Accepted Answer

A)  experiencing depolarization.
B)  propagating an action potential.
C)  polarized.
D)  more negatively charged on its exterior than in its interior.

Question 7

On a laboratory exam,you are asked to identify various muscle tissues through the microscope.Describe the characteristics you will use to differentiate among the three types of muscle tissue.

Accepted Answer

First,look for light and dark bands know...

Question 8

What anchors thin and elastic filaments in place within the myofibril?

Accepted Answer

A)  M line
B)  A band
C)  Z disc
D)  I band

Question 9

List and describe the types of contractile and regulatory proteins found in a thin filament.

Accepted Answer

A thin filament is composed of actin,tro...

Question 10

Greater muscle tension results when muscle fibers are repeatedly stimulated.

Accepted Answer

A) True 
 B)False

Question 11

Myofilaments shorten to produce muscle contractions according to the sliding filament mechanism.

Accepted Answer

A) True 
 B)False

Question 12

Where should most of the potassium ions be located when a muscle cell is at rest?

Accepted Answer

A)  sarcoplasmic reticulum
B)  transverse tubules (T-tubules) 
C)  extracellular fluid
D)  cytosol of the muscle cell

Question 13

Which statement best describes the function of myoglobin?

Accepted Answer

A)  Myoglobin is a source of ATP for muscles.
B)  Myoglobin hydrolyzes ATP.
C)  Myoglobin catabolizes glycogen.
D)  Myoglobin stores oxygen in muscle cells.

Question 14

Cindy's leg muscles displayed a state of hypotonia since her arm was recently removed from a cast.

Accepted Answer

A) True 
 B)False

Question 15

Latrotoxin,produced by the poisonous black widow spider,increases the release of acetylcholine.How do muscle cells respond?

Accepted Answer

A)  Muscle cells will become paralyzed when excess acetylcholine exists.
B)  Muscle cells will experience fused or complete tetanus when excess acetylcholine exists.
C)  Muscle cells will twitch irregularly when excess acetylcholine exists.
D)  Muscle cells will experience a longer latent period when excess acetylcholine exists.

Question 16

What do skeletal muscle contractions share in common with smooth muscle contractions?
A)Both types of contractions do not require calcium ions for a contraction to occur.
B)Both types of contractions consume very little ATP.
C)Both types of contractions result from thick and thin filaments sliding past one another.
D)Both types of contractions generate little force or a weak force.

Accepted Answer

C ESSAY.Write your a...

Question 17

In a sarcomere,the light and dark bands are produced by alternating M lines and Z discs.

Accepted Answer

A) True 
 B)False

Question 18

The type of contraction in which length of the muscle fibers do not change is called:

Accepted Answer

A)  isotonic eccentric.
B)  tetany.
C)  isotonic concentric.
D)  isometric.

Question 19

Which fiber type allows Frances to stand for hours in her job as a nurse?

Accepted Answer

A)  type IIa fiber
B)  type I fiber
C)  type IIx fiber
D)  type III fiber

Question 20

A pathway of ATP production that results in the formation of lactic acid is:

Accepted Answer

A)  glycolytic catabolism.
B)  oxidative catabolism.
C)  anabolism.
D)  aerobic catabolism.

Exam 10: Muscle Tissue Physiology

In a sarcomere,the light and dark bands are produced by alternating M lines and Z discs.

Correct Answer
verified

A muscle cell experiencing resting membrane potential is:

Correct Answer
verified

Which statement best describes the function of myoglobin?

Correct Answer
verified

What characteristic is NOT descriptive of cardiac muscle tissue?

Correct Answer
verified

What anchors thin and elastic filaments in place within the myofibril?

Correct Answer
verified

The function of the sarcoplasmic reticulum (SR)is to store and release calcium ions.

Correct Answer
verified

Where should most of the potassium ions be located when a muscle cell is at rest?

Correct Answer
verified

During the recovery period after exercise,we breathe deeper and faster.This increased rate of respiration is known as:

Correct Answer
verified

Greater muscle tension results when muscle fibers are repeatedly stimulated.

Correct Answer
verified

List and describe the types of contractile and regulatory proteins found in a thin filament.

Correct Answer
verified
A thin filament is composed of actin,tro...
View Answer

Latrotoxin,produced by the poisonous black widow spider,increases the release of acetylcholine.How do muscle cells respond?

Correct Answer
verified

Myofilaments shorten to produce muscle contractions according to the sliding filament mechanism.

Correct Answer
verified

On a laboratory exam,you are asked to identify various muscle tissues through the microscope.Describe the characteristics you will use to differentiate among the three types of muscle tissue.

Correct Answer
verified
First,look for light and dark bands know...
View Answer

The type of contraction in which length of the muscle fibers do not change is called:

Correct Answer
verified

Correct Answer
verified
C ESSAY.Write your a...
View Answer

Cindy's leg muscles displayed a state of hypotonia since her arm was recently removed from a cast.

Correct Answer
verified

What is accomplished by the power stroke?

Correct Answer
verified

Which fiber type allows Frances to stand for hours in her job as a nurse?

Correct Answer
verified

A pathway of ATP production that results in the formation of lactic acid is:

Correct Answer
verified

Which of the following statements is the most accurate description of the sliding filament mechanism?

Correct Answer
verified

Exam 10: Muscle Tissue Physiology

In a sarcomere,the light and dark bands are produced by alternating M lines and Z discs.

Correct AnswerverifiedShow Answer

A muscle cell experiencing resting membrane potential is:

Correct AnswerverifiedShow Answer

Which statement best describes the function of myoglobin?

Correct AnswerverifiedShow Answer

What characteristic is NOT descriptive of cardiac muscle tissue?

Correct AnswerverifiedShow Answer

What anchors thin and elastic filaments in place within the myofibril?

Correct AnswerverifiedShow Answer

The function of the sarcoplasmic reticulum (SR)is to store and release calcium ions.

Correct AnswerverifiedShow Answer

Where should most of the potassium ions be located when a muscle cell is at rest?

Correct AnswerverifiedShow Answer

During the recovery period after exercise,we breathe deeper and faster.This increased rate of respiration is known as:

Correct AnswerverifiedShow Answer

Greater muscle tension results when muscle fibers are repeatedly stimulated.

Correct AnswerverifiedShow Answer

List and describe the types of contractile and regulatory proteins found in a thin filament.

Correct AnswerverifiedA thin filament is composed of actin,tro...View AnswerShow Answer

Latrotoxin,produced by the poisonous black widow spider,increases the release of acetylcholine.How do muscle cells respond?

Correct AnswerverifiedShow Answer

Myofilaments shorten to produce muscle contractions according to the sliding filament mechanism.

Correct AnswerverifiedShow Answer

On a laboratory exam,you are asked to identify various muscle tissues through the microscope.Describe the characteristics you will use to differentiate among the three types of muscle tissue.

Correct AnswerverifiedFirst,look for light and dark bands know...View AnswerShow Answer

The type of contraction in which length of the muscle fibers do not change is called:

Correct AnswerverifiedShow Answer

Correct AnswerverifiedC ESSAY.Write your a...View AnswerShow Answer

Cindy's leg muscles displayed a state of hypotonia since her arm was recently removed from a cast.

Correct AnswerverifiedShow Answer

What is accomplished by the power stroke?

Correct AnswerverifiedShow Answer

Which fiber type allows Frances to stand for hours in her job as a nurse?

Correct AnswerverifiedShow Answer

A pathway of ATP production that results in the formation of lactic acid is:

Correct AnswerverifiedShow Answer

Which of the following statements is the most accurate description of the sliding filament mechanism?

Correct AnswerverifiedShow Answer

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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A thin filament is composed of actin,tro...
View Answer

Correct Answer
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Correct Answer
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Correct Answer
verified
First,look for light and dark bands know...
View Answer

Correct Answer
verified

Correct Answer
verified
C ESSAY.Write your a...
View 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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