Question 1

In this type of smooth muscle,muscle fibers are separate and not organized into sheets.

Accepted Answer

A)   multiunit smooth muscle
B)   visceral smooth muscle
C)   skeletal muscle
D)   cardiac muscleE) A) and D)
F) B) and D)

Question 2

The threshold stimulus is the

Accepted Answer

A)   minimum strength of stimulus required to cause muscle fiber contraction to occur.
B)   maximal amount of force a muscle can exert.
C)   amount of oxygen a muscle needs for repeated contractions.
D)   minimal amount of force a muscle can exert.
E)   maximal amount of stimulation a muscle can withstand.F) A) and E)
G) B) and E)

Question 3

Endomysium separates individual muscle fibers from each other.

Accepted Answer

A) True 
 B)False

Question 4

When an increased concentration of calcium ion is in the sarcoplasm,

Accepted Answer

A)   actin binding sites are exposed.
B)   myosin binding sites are exposed.
C)   troponin binding sites are exposed.
D)   actin and myosin cannot accomplish contraction.E) All of the above
F) C) and D)

Question 5

What does not describe the region known as the motor end plate?

Accepted Answer

A)   It is highly folded.
B)   Nuclei and mitochondria are abundant.
C)   It contains synaptic vesicles.
D)   It is part of the muscle fiber.E) All of the above
F) B) and C)

Question 6

Skeletal muscle cells appear striated because of these parallel bundles.

Accepted Answer

A)   sarcomeres
B)   Z lines
C)   myosin
D)   myofibrilsE) A) and B)
F) B) and C)

Question 7

This type of smooth muscle is found in the walls of hollow organs like the stomach,intestine,and urinary bladder.

Accepted Answer

A)   parietal
B)   visceral
C)   dorsal
D)   ventral
E)   multiunitF) None of the above
G) A) and C)

Question 8

An antagonist to the sternocleidomastoid muscle would be

Accepted Answer

A)   on the dorsal side of the body.
B)   on the ventral side of the body.
C)   inferior to the clavicle.
D)   superior to the clavicle and sternum.E) B) and C)
F) A) and D)

Question 9

The time lag between muscle stimulation and the beginning of contraction is called the ________.

Accepted Answer

The answer of The time lag between muscle stimulation and...

Question 10

Creatine phosphate

Accepted Answer

A)   causes the decomposition of ATP.
B)   causes the decomposition of ADP.
C)   supplies energy for the synthesis of ATP.
D)   supplies energy for the breakdown of ATP to ADP.
E)   binds to Ach receptors.F) C) and D)
G) A) and D)

Question 11

These are defined as a set of membranous channels that extend inward from the plasma membrane of the muscle cell and pass all the way through the cell.

Accepted Answer

A)   sarcomeres
B)   myofibrils
C)   transverse tubules
D)   cisternaeE) B) and C)
F) A) and D)

Question 12

Intercalated discs are found in skeletal muscle as well as cardiac muscle.

Accepted Answer

A) True 
 B)False

Question 13

Troponin,tropomyosin and actin are all parts of the thin filament.

Accepted Answer

A) True 
 B)False

Question 14

The amount of oxygen needed to support the conversion of lactic acid to glucose by the liver is called the

Accepted Answer

A)   refractory quantity.
B)   oxygen debt.
C)   anaerobic value.
D)   aerobic conversion.
E)   lactate debt.F) A) and E)
G) B) and D)

Question 15

The term "muscle" can refer to

Accepted Answer

A)   a cell.
B)   a tissue.
C)   an organ.
D)   All of the choices are correct.E) A) and D)
F) A) and C)

Question 16

The enzyme acetylcholinesterase causes acetylcholine to

Accepted Answer

A)   bind to actin.
B)   be secreted from the motor end plate.
C)   decompose.
D)   form cross bridges.
E)   None of the choices are correct.F) C) and D)
G) A) and C)

Question 17

The rhythmic,wavelike motion produced by visceral smooth muscle is called __________.

Accepted Answer

The answer of The rhythmic,wavelike motion produced by visceral smooth...

Question 18

A single contraction of a muscle fiber in response to a single stimulus is a

Accepted Answer

A)   summation.
B)   threshold stimulus.
C)   twitch.
D)   cramp.
E)   all-or-none response.F) A) and C)
G) C) and D)

Question 19

The neurotransmitter in skeletal muscle contraction is ___________.

Accepted Answer

A)   norepinephrine
B)   actin
C)   acetylcholine
D)   tropomyosinE) All of the above
F) None of the above

Question 20

A motor unit typically includes

Accepted Answer

A)   muscle fibers only.
B)   motor neurons only.
C)   several motor neurons and one muscle fiber.
D)   one motor neuron and several muscle fibers.
E)   several motor neurons and several muscle fibers.F) A) and B)
G) C) and D)

Exam 8: Muscular System

The term "muscle" can refer to

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When an increased concentration of calcium ion is in the sarcoplasm,

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Endomysium separates individual muscle fibers from each other.

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The amount of oxygen needed to support the conversion of lactic acid to glucose by the liver is called the

Correct AnswerverifiedShow Answer

The rhythmic,wavelike motion produced by visceral smooth muscle is called __________.

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The time lag between muscle stimulation and the beginning of contraction is called the ________.

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Creatine phosphate

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Intercalated discs are found in skeletal muscle as well as cardiac muscle.

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This type of smooth muscle is found in the walls of hollow organs like the stomach,intestine,and urinary bladder.

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The enzyme acetylcholinesterase causes acetylcholine to

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The neurotransmitter in skeletal muscle contraction is ___________.

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A motor unit typically includes

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The threshold stimulus is the

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An antagonist to the sternocleidomastoid muscle would be

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These are defined as a set of membranous channels that extend inward from the plasma membrane of the muscle cell and pass all the way through the cell.

Correct AnswerverifiedShow Answer

Troponin,tropomyosin and actin are all parts of the thin filament.

Correct AnswerverifiedShow Answer

In this type of smooth muscle,muscle fibers are separate and not organized into sheets.

Correct AnswerverifiedShow Answer

Skeletal muscle cells appear striated because of these parallel bundles.

Correct AnswerverifiedShow Answer

A single contraction of a muscle fiber in response to a single stimulus is a

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What does not describe the region known as the motor end plate?

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