Question 1

Which region of a somite differentiates into the skeletal muscles?

Accepted Answer

A)  Sclerotome
B)  Dermatome
C)  MyotomeD) B) and C)
E) A) and C)

Question 2

The T-tubules and sarcoplasmic reticulum are unique to muscle fibers.

Accepted Answer

A) True 
 B)False

Question 3

A sphincter has

Accepted Answer

A)  widespread muscle fibers that converge on a common attachment site.
B)  muscle fibers concentrically arranged.
C)  fibers arranged in a parallel form.
D)  fascicles arranged obliquely to their tendon.
E)  fascicles that alternate superiorly and inferiorly.F) A) and E)
G) B) and D)

Question 4

The vascular supply to slow muscle fibers is ______ the network of capillaries around fast muscle fibers.

Accepted Answer

A)  more extensive than
B)  less extensive than
C)  the same as that ofD) B) and C)
E) All of the above

Question 5

Which incorrectly describes what happens during skeletal muscle contraction?

Accepted Answer

A)  The width of the A band remains constant.
B)  The H zone disappears.
C)  The Z discs of a sarcomere move farther apart.
D)  The sarcomere narrows.
E)  The I bands narrow.F) D) and E)
G) All of the above

Question 6

With increased age,skeletal muscles show

Accepted Answer

A)  a decrease in the number of myofibrils.
B)  an increase in muscle fiber diameter.
C)  no change in oxygen storage capability.
D)  increased glycogen reserves.
E)  a tendency to fatigue less rapidly.F) A) and B)
G) C) and D)

Question 7

The functional contractile unit of a skeletal muscle fiber is called a _______________.

Accepted Answer

The answer of The functional contractile unit of a skeletal...

Question 8

An increase in the size of a muscle fiber is called _________________.

Accepted Answer

The answer of An increase in the size of a...

Question 9

Which may occur as a result of muscle atrophy?

Accepted Answer

A)  Muscle size is reduced.
B)  Fibers become weaker.
C)  Muscle loses tone.
D)  Fibers waste away and die.
E)  All of the choices are correct.F) B) and D)
G) A) and D)

Question 10

A muscle whose name has "orbicularis" in it is _______ in appearance.

Accepted Answer

A)  oblique
B)  straight
C)  small
D)  very large
E)  circularF) All of the above
G) A) and C)

Question 11

The embryonic-like cells that remain in adult skeletal muscle tissue are known as satellite cells.

Accepted Answer

A) True 
 B)False

Question 12

Which are possible functions of skeletal muscles?
A: Maintenance of posture
B: Both highly coordinated and localized simple movements
C: Temperature regulation
D: Support of certain body organs
E: Restricting the movement of material through certain body tracts

Accepted Answer

A)  a,b,e
B)  a,b,c
C)  a,b,c,e
D)  a,b,c,d
E)  a,b,c,d,eF) A) and D)
G) B) and E)

Question 13

The plasma membrane of a skeletal muscle fiber is called the ______________.

Accepted Answer

The answer of The plasma membrane of a skeletal muscle...

Question 14

During an ________ contraction,the length of the muscle does not change.

Accepted Answer

The answer of During an ________ contraction,the length of the...

Question 15

Which structures are reservoirs that store acetylcholine?

Accepted Answer

A)  Synaptic vesicles
B)  Synaptic clefts
C)  Terminal cisternae
D)  Lysosomes
E)  SarcomeresF) A) and D)
G) A) and C)

Question 16

Skeletal muscle contraction requires large amounts of energy in the form of ___________ in order to complete the sequence of cyclic events that lead to sarcomere shortening.

Accepted Answer

The answer of Skeletal muscle contraction requires large amounts of...

Question 17

The energy to drive the myosin movement during skeletal muscle contraction is provided by ATP.

Accepted Answer

A) True 
 B)False

Question 18

The return of a contracted muscle fiber to its resting length is an active (energy requiring)process.

Accepted Answer

A) True 
 B)False

Question 19

During skeletal muscle fiber contraction,the I bands and H zones narrow.

Accepted Answer

A) True 
 B)False

Question 20

A term that could be used to describe the changes that occur in muscle fibers as humans age would be

Accepted Answer

A)  proliferation.
B)  hypertrophy.
C)  convergence.
D)  atrophy.
E)  myofascia.F) C) and D)
G) A) and E)

Exam 10: Muscle Tissue and Organization

The return of a contracted muscle fiber to its resting length is an active (energy requiring)process.

Correct AnswerverifiedShow Answer

A muscle whose name has "orbicularis" in it is _______ in appearance.

Correct AnswerverifiedShow Answer

The embryonic-like cells that remain in adult skeletal muscle tissue are known as satellite cells.

Correct AnswerverifiedShow Answer

Which region of a somite differentiates into the skeletal muscles?

Correct AnswerverifiedShow Answer

Which may occur as a result of muscle atrophy?

Correct AnswerverifiedShow Answer

The T-tubules and sarcoplasmic reticulum are unique to muscle fibers.

Correct AnswerverifiedShow Answer

Which incorrectly describes what happens during skeletal muscle contraction?

Correct AnswerverifiedShow Answer

A term that could be used to describe the changes that occur in muscle fibers as humans age would be

Correct AnswerverifiedShow Answer

The functional contractile unit of a skeletal muscle fiber is called a _______________.

Correct AnswerverifiedShow Answer

Skeletal muscle contraction requires large amounts of energy in the form of ___________ in order to complete the sequence of cyclic events that lead to sarcomere shortening.

Correct AnswerverifiedShow Answer

With increased age,skeletal muscles show

Correct AnswerverifiedShow Answer

The energy to drive the myosin movement during skeletal muscle contraction is provided by ATP.

Correct AnswerverifiedShow Answer

The plasma membrane of a skeletal muscle fiber is called the ______________.

Correct AnswerverifiedShow Answer

Which are possible functions of skeletal muscles? A: Maintenance of posture B: Both highly coordinated and localized simple movements C: Temperature regulation D: Support of certain body organs E: Restricting the movement of material through certain body tracts

Correct AnswerverifiedShow Answer

During skeletal muscle fiber contraction,the I bands and H zones narrow.

Correct AnswerverifiedShow Answer

An increase in the size of a muscle fiber is called _________________.

Correct AnswerverifiedShow Answer

A sphincter has

Correct AnswerverifiedShow Answer

During an ________ contraction,the length of the muscle does not change.

Correct AnswerverifiedShow Answer

The vascular supply to slow muscle fibers is ______ the network of capillaries around fast muscle fibers.

Correct AnswerverifiedShow Answer

Which structures are reservoirs that store acetylcholine?

Correct AnswerverifiedShow Answer

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