Question 1

Addition of more mitochondria to a muscle fiber will have the least effect on ________.

Accepted Answer

A)  slow oxidative fibers
B)  fast glycolytic fibers
C)  fast oxidative fibers
D)  both slow and fast oxidative fibers

Question 2

Which of the following is true about smooth muscle?

Accepted Answer

A)  Certain smooth muscle cells can actually divide to increase their numbers.
B)  Smooth muscle has well-developed T tubules at the site of invagination.
C)  Smooth muscle,in contrast to skeletal muscle,cannot synthesize or secrete any connective tissue elements.
D)  Smooth muscle cannot stretch as much as skeletal muscle.

Question 3

Which of the following statements is most accurate?

Accepted Answer

A)  T tubules may be sliding during isotonic contraction.
B)  Myofilaments slide during isometric contractions.
C)  Muscle tension remains relatively constant during isotonic contraction.
D)  The I band lengthens during isotonic contraction.

Question 4

Peristalsis is characteristic of smooth muscle.

Accepted Answer

A) True 
 B)False

Question 5

Describe how the unique contractile mechanism of smooth muscle allows it to contract and remain in a contracted state for long periods of time with relatively little energy expenditure.

Accepted Answer

Smooth muscle possesses a latc...

Question 6

Approximately 80% of a muscle fiber's volume are the myofibrils.This characteristic reflects muscles ability to ________.

Accepted Answer

A)  store oxygen molecules that can be used in aerobic respiration
B)  produce relatively high amounts of ATP
C)  produce movement through contractile force
D)  generate and propagate action potential

Question 7

What is the most distinguishing characteristic of muscle tissue?

Accepted Answer

A)  it is composed of multiple cells working together
B)  the ability to respond to nervous stimulation
C)  the ability to transform chemical energy into mechanical energy to move the body
D)  its cells' in ability to reproduce by mitosis

Question 8

The effect of a neurotransmitter on the muscle cell membrane is to modify its ion permeability properties temporarily.

Accepted Answer

A) True 
 B)False

Question 9

Describe the difference between muscle tension,muscle contraction and a muscle twitch.

Accepted Answer

A muscle twitch is the response of a mot...

Question 10

What is the role of tropomyosin in skeletal muscles?

Accepted Answer

A)  Tropomyosin serves as a contraction inhibitor by blocking the myosin binding sites on the actin molecules.
B)  Tropomyosin is the chemical that activates the myosin heads.
C)  Tropomyosin serves as a contraction inhibitor by blocking the actin binding sites on the myosin molecules.
D)  Tropomyosin is the receptor for the motor neuron neurotransmitter.

Question 11

Only ________ muscle cells are multinucleated.

Accepted Answer

The answer of Only ________ muscle cells are multinucleated....

Question 12

Which muscle cells have the greatest ability to regenerate?

Accepted Answer

A)  no muscle can regenerate
B)  smooth
C)  skeletal
D)  cardiac

Question 13

When a muscle fiber contracts,the I bands diminish in size,the H zones disappear,and the A bands do not diminish in length.

Accepted Answer

A) True 
 B)False

Question 14

Rigor mortis occurs because ________.

Accepted Answer

A)  no ATP is available to release attached actin and myosin molecules
B)  proteins are beginning to break down,thus preventing a flow of calcium ions
C)  the cells are dead
D)  sodium ions leak into the muscle causing continued contractions

Question 15

The sliding filament model of contraction involves ________.

Accepted Answer

A)  actin and myosin lengthening in order to slide past each other
B)  the Z discs sliding over the myofilaments
C)  actin and myosin sliding past each other and partially overlapping
D)  the shortening of thick filaments so that thin filaments slide past

Question 16

An increase in the calcium ion level in the sarcoplasm starts the sliding of the thin filaments.When the level of calcium ions declines,sliding stops.

Accepted Answer

A) True 
 B)False

Question 17

Although all the anatomical parts of muscle work together to give it it's characteristics,which of the following proteins listed below would be most associated with the characteristics of extensibility?

Accepted Answer

A)  elastic (titin) filaments
B)  potassium (K+) leak channels
C)  acetylcholine receptors in the motor end plate
D)  thick (myosin) filaments

Question 18

When a geriatric patient is admitted to the postsurgical unit,an important nursing measure is to prevent the loss of muscle mass.What is the term used for loss of muscle mass and how can the patient prevent it?

Accepted Answer

Disuse atrophy is degeneration and loss ...

Question 19

A contraction in which the muscle does not shorten but its tension increases is called isometric contraction.

Accepted Answer

A) True 
 B)False

Question 20

The oxygen-binding protein found in muscle cells is ________.

Accepted Answer

A)  hemoglobin
B)  immunoglobin
C)  ATP
D)  myoglobin

Exam 9: Muscles and Muscle Tissue

Which of the following is true about smooth muscle?

Correct AnswerverifiedShow Answer

The sliding filament model of contraction involves ________.

Correct AnswerverifiedShow Answer

What is the most distinguishing characteristic of muscle tissue?

Correct AnswerverifiedShow Answer

Addition of more mitochondria to a muscle fiber will have the least effect on ________.

Correct AnswerverifiedShow Answer

Peristalsis is characteristic of smooth muscle.

Correct AnswerverifiedShow Answer

When a muscle fiber contracts,the I bands diminish in size,the H zones disappear,and the A bands do not diminish in length.

Correct AnswerverifiedShow Answer

Rigor mortis occurs because ________.

Correct AnswerverifiedShow Answer

Describe how the unique contractile mechanism of smooth muscle allows it to contract and remain in a contracted state for long periods of time with relatively little energy expenditure.

Correct AnswerverifiedSmooth muscle possesses a latc...View AnswerShow Answer

Describe the difference between muscle tension,muscle contraction and a muscle twitch.

Correct AnswerverifiedA muscle twitch is the response of a mot...View AnswerShow Answer

The effect of a neurotransmitter on the muscle cell membrane is to modify its ion permeability properties temporarily.

Correct AnswerverifiedShow Answer

Although all the anatomical parts of muscle work together to give it it's characteristics,which of the following proteins listed below would be most associated with the characteristics of extensibility?

Correct AnswerverifiedShow Answer

What is the role of tropomyosin in skeletal muscles?

Correct AnswerverifiedShow Answer

The oxygen-binding protein found in muscle cells is ________.

Correct AnswerverifiedShow Answer

A contraction in which the muscle does not shorten but its tension increases is called isometric contraction.

Correct AnswerverifiedShow Answer

An increase in the calcium ion level in the sarcoplasm starts the sliding of the thin filaments.When the level of calcium ions declines,sliding stops.

Correct AnswerverifiedShow Answer

When a geriatric patient is admitted to the postsurgical unit,an important nursing measure is to prevent the loss of muscle mass.What is the term used for loss of muscle mass and how can the patient prevent it?

Correct AnswerverifiedDisuse atrophy is degeneration and loss ...View AnswerShow Answer

Which muscle cells have the greatest ability to regenerate?

Correct AnswerverifiedShow Answer

Approximately 80% of a muscle fiber's volume are the myofibrils.This characteristic reflects muscles ability to ________.

Correct AnswerverifiedShow Answer

Which of the following statements is most accurate?

Correct AnswerverifiedShow Answer

Only ________ muscle cells are multinucleated.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Smooth muscle possesses a latc...
View Answer

Correct Answer
verified
A muscle twitch is the response of a mot...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Disuse atrophy is degeneration and loss ...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified