Question 1

The action potential of a muscle fiber occurs

Accepted Answer

A)  at the end plate.
B)  along the sarcolemma and down the T-tubules.
C)  within the sarcoplasmic reticulum.
D)  in the mitochondria.E) B) and C)
F) A) and D)

Question 2

The calcium ions involved in skeletal muscle contraction bind to a(n) ______ subunit.

Accepted Answer

A)  myosin
B)  actin
C)  elastin
D)  tropomyosin
E)  troponinF) D) and E)
G) B) and E)

Question 3

Lifting weights will cause muscles to enlarge.This is primarily due to

Accepted Answer

A)  an increase in the number of muscle cells.
B)  an increase in the size of muscle cells.C) A) and B)
D) undefined

Question 4

Cardiac muscle cells tend to be thicker and shorter than skeletal muscle cells.

Accepted Answer

A) True 
 B)False

Question 5

A typical skeletal muscle cell contains approximately _____ mitochondria.

Accepted Answer

A)  3
B)  30
C)  300
D)  3000E) A) and B)
F) None of the above

Question 6

Which is not a protein found in thin filaments

Accepted Answer

A)  Actin
B)  Troponin
C)  Tropomyosin
D)  Sarcomyosin
E)  No exceptions;all are found in thin filamentsF) A) and E)
G) A) and D)

Question 7

Which letter is associated with the line that is a thin protein structure that serves as an attachment site for thin filament ends

Accepted Answer

A)  I
B)  A
C)  Z
D)  M
E)  HF) C) and E)
G) None of the above

Question 8

A drug that inhibited acetylcholinesterase would result in

Accepted Answer

A)  a failure to stimulate the muscle due to decreased ACh release.
B)  enhanced stimulation of the muscle due to decreased ACh breakdown.
C)  enhanced stimulation of the muscle due to enhanced ACh release.
D)  poor muscle stimulation due to enhanced ACh breakdown.E) C) and D)
F) A) and B)

Question 9

On a muscle fiber,the two terminal cisternae and the centrally placed T-tubule form a structure called a ______________.

Accepted Answer

The answer of On a muscle fiber,the two terminal cisternae...

Question 10

The iris of the eye contains

Accepted Answer

A)  skeletal muscle.
B)  multiunit smooth muscle.
C)  single-unit smooth muscle.
D)  cardiac muscle.E) All of the above
F) B) and C)

Question 11

Oxidative fibers are

Accepted Answer

A)  red and fatigue-resistant.
B)  red and fatigable.
C)  white and fatigue-resistant.
D)  white and fatigable.E) B) and C)
F) A) and D)

Question 12

-This sarcomere depicts relaxed muscle.Which number identifies the M line

Accepted Answer

A)  1
B)  3
C)  4
D)  5E) A) and D)
F) B) and C)

Question 13

One's genes have a greater impact than exercise habits in determining the proportion of fast-twitch and slow-twitch fibers throughout the body.

Accepted Answer

A) True 
 B)False

Question 14

Smooth muscle tissue is found in the organs of the digestive tract,the walls of blood vessels,and the iris.

Accepted Answer

A) True 
 B)False

Question 15

In an isotonic contraction,the tension produced exceeds the resistance and muscle fibers will shorten.

Accepted Answer

A) True 
 B)False

Question 16

Phosphate transfer is used for

Accepted Answer

A)  immediate ATP needs and is dependent on oxygen.
B)  immediate ATP needs and is not dependent on oxygen.
C)  long term ATP needs and is dependent on oxygen.
D)  long term ATP needs and is not dependent on the presence of oxygen.E) B) and D)
F) A) and B)

Question 17

The _____________ is the connective tissue covering of a fascicle.

Accepted Answer

The answer of The _____________ is the connective tissue covering...

Question 18

During skeletal muscle contraction,more force is created when more motor units are activated.

Accepted Answer

A) True 
 B)False

Question 19

Within smooth muscle cells,intermediate filaments are linked by dense _________ at points where they attach on the inner surface of the cell membrane.

Accepted Answer

The answer of Within smooth muscle cells,intermediate filaments are linked...

Question 20

Release of crossbridges and a decline in muscle tension characterize the _______ period of a twitch.

Accepted Answer

A)  contraction
B)  latent
C)  relaxationD) None of the above
E) All of the above

Exam 10: Muscle Tissue

Which is not a protein found in thin filaments

Correct AnswerverifiedShow Answer

Within smooth muscle cells,intermediate filaments are linked by dense _________ at points where they attach on the inner surface of the cell membrane.

Correct AnswerverifiedShow Answer

Release of crossbridges and a decline in muscle tension characterize the _______ period of a twitch.

Correct AnswerverifiedShow Answer

During skeletal muscle contraction,more force is created when more motor units are activated.

Correct AnswerverifiedShow Answer

The _____________ is the connective tissue covering of a fascicle.

Correct AnswerverifiedShow Answer

Lifting weights will cause muscles to enlarge.This is primarily due to

Correct AnswerverifiedShow Answer

Cardiac muscle cells tend to be thicker and shorter than skeletal muscle cells.

Correct AnswerverifiedShow Answer

The calcium ions involved in skeletal muscle contraction bind to a(n) ______ subunit.

Correct AnswerverifiedShow Answer

Oxidative fibers are

Correct AnswerverifiedShow Answer

A typical skeletal muscle cell contains approximately _____ mitochondria.

Correct AnswerverifiedShow Answer

Which letter is associated with the line that is a thin protein structure that serves as an attachment site for thin filament ends

Correct AnswerverifiedShow Answer

A drug that inhibited acetylcholinesterase would result in

Correct AnswerverifiedShow Answer

The iris of the eye contains

Correct AnswerverifiedShow Answer

Phosphate transfer is used for

Correct AnswerverifiedShow Answer

The action potential of a muscle fiber occurs

Correct AnswerverifiedShow Answer

On a muscle fiber,the two terminal cisternae and the centrally placed T-tubule form a structure called a ______________.

Correct AnswerverifiedShow Answer

In an isotonic contraction,the tension produced exceeds the resistance and muscle fibers will shorten.

Correct AnswerverifiedShow Answer

One's genes have a greater impact than exercise habits in determining the proportion of fast-twitch and slow-twitch fibers throughout the body.

Correct AnswerverifiedShow Answer

Smooth muscle tissue is found in the organs of the digestive tract,the walls of blood vessels,and the iris.

Correct AnswerverifiedShow Answer

-This sarcomere depicts relaxed muscle.Which number identifies the M line

Correct AnswerverifiedShow Answer

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