Question 1

The function of the gluteus maximus is to:

Accepted Answer

A)  stabilize the vertebral column
B)  extend the thigh
C)  flex the thigh
D)  flex the vertebral column

Question 2

The units of contraction within a muscle fiber are called:

Accepted Answer

A)  sarcolemmas
B)  sarcomeres
C)  troponin and myosin
D)  sarcoplasmic reticulums

Question 3

The muscle around the mouth that puckers the lips is the ____________________.

Accepted Answer

The answer of The muscle around the mouth that puckers...

Question 4

The organ system that transports oxygen to muscles is the:

Accepted Answer

A)  nervous system
B)  circulatory system
C)  skeletal system
D)  respiratory system

Question 5

During depolarization of a muscle fiber,there is a ____________________ charge outside the membrane and a ____________________ charge inside.

Accepted Answer

The answer of During depolarization of a muscle fiber,there is...

Question 6

The function of the tibialis anterior is to:

Accepted Answer

A)  flex the leg
B)  extend the leg
C)  dorsiflex the foot
D)  plantar flex the foot

Question 7

Muscle tone in a skeletal muscle is a state of:

Accepted Answer

A)  slight contraction that does not depend upon nerve impulses
B)  prolonged contraction necessary to do efficient work
C)  slight contraction that depends upon nerve impulses
D)  relaxation to prepare for contraction

Question 8

Which of the following statements are true of electrical changes at the sarcolemma?
 (Read carefully and select all of the correct statements.)

Accepted Answer

A)  A polarized muscle fiber has more Na+ ions inside than outside.
B)  Depolarization is the movement of K+ ions into the cell.
C)  Repolarization is the movement of Na+ ions out of the cell.
D)  A polarized muscle fiber has a positive charge inside and a negative charge outside.
E)  Depolarization is a reversal of charges; the cell has a positive charge outside and a negative charge insidE.F) An action potential is depolarization followed by repolarization.

Question 9

A single muscle fiber contraction is called a ____,and the sustained contraction of a muscle fiber is called ____.

Accepted Answer

A)  twitch/prolonged twitch
B)  tetanus/coordination
C)  twitch/tetanus
D)  tetanus/extended action potential

Question 10

The muscle on the anterior side of the trunk that flexes and adducts the arm is the:

Accepted Answer

A)  latissimus dorsi
B)  pectoralis major
C)  teres major
D)  trapezius

Question 11

In a neuromuscular junction,the impulse is transmitted from the motor neuron by ____________________ to the ____________________.

Accepted Answer

acetylchol...

Question 12

Which statement is NOT true of gross muscle structure?

Accepted Answer

A)  A tendon connects muscle to bone.
B)  The more movable bone attachment is the insertion.
C)  The fascia of a muscle merges with the ligaments of a bone.
D)  The origin is the more stationary bone attachment.

Question 13

Two indirect energy sources for muscle contraction are ____________________ and ____________________.

Accepted Answer

creatine phosphate,g...

Question 14

In the neuromuscular junction,the ____________________ is the end of the motor neuron.

Accepted Answer

The answer of In the neuromuscular junction,the ____________________ is the...

Question 15

Muscles with the same or similar function are called ____________________.

Accepted Answer

The answer of Muscles with the same or similar function...

Question 16

The most abundant energy source for muscle contraction is:

Accepted Answer

A)  ATP
B)  creatine phosphate
C)  oxygen
D)  glycogen

Question 17

Depolarization of a muscle fiber is stimulated by:

Accepted Answer

A)  potassium ions
B)  calcium ions
C)  cholinesterase
D)  acetylcholine

Question 18

Which statement is NOT true of synergistic muscles?

Accepted Answer

A)  These include muscles that have the same function.
B)  These include muscles that stabilize a joint to make a more precise movement possible.
C)  The muscle that does most of the work is called the main muscle.
D)  Synergists are needed because a bone may be in several different positions.

Question 19

The organ system that forms a framework that is moved by muscles is the:

Accepted Answer

A)  nervous system
B)  circulatory system
C)  skeletal system
D)  respiratory system

Question 20

The muscle on the lateral side of the hip that abducts the thigh is the:

Accepted Answer

A)  quadriceps femoris
B)  hamstring group
C)  gluteus medius
D)  adductor group

Exam 7: The Muscular System

The function of the tibialis anterior is to:

Correct AnswerverifiedShow Answer

A single muscle fiber contraction is called a ____,and the sustained contraction of a muscle fiber is called ____.

Correct AnswerverifiedShow Answer

In the neuromuscular junction,the ____________________ is the end of the motor neuron.

Correct AnswerverifiedShow Answer

Which of the following statements are true of electrical changes at the sarcolemma? (Read carefully and select all of the correct statements.)

Correct AnswerverifiedShow Answer

The organ system that forms a framework that is moved by muscles is the:

Correct AnswerverifiedShow Answer

During depolarization of a muscle fiber,there is a ____________________ charge outside the membrane and a ____________________ charge inside.

Correct AnswerverifiedShow Answer

In a neuromuscular junction,the impulse is transmitted from the motor neuron by ____________________ to the ____________________.

Correct Answerverifiedacetylchol...View AnswerShow Answer

The units of contraction within a muscle fiber are called:

Correct AnswerverifiedShow Answer

Muscle tone in a skeletal muscle is a state of:

Correct AnswerverifiedShow Answer

The muscle on the anterior side of the trunk that flexes and adducts the arm is the:

Correct AnswerverifiedShow Answer

Two indirect energy sources for muscle contraction are ____________________ and ____________________.

Correct Answerverifiedcreatine phosphate,g...View AnswerShow Answer

The muscle around the mouth that puckers the lips is the ____________________.

Correct AnswerverifiedShow Answer

The function of the gluteus maximus is to:

Correct AnswerverifiedShow Answer

The organ system that transports oxygen to muscles is the:

Correct AnswerverifiedShow Answer

The most abundant energy source for muscle contraction is:

Correct AnswerverifiedShow Answer

Which statement is NOT true of synergistic muscles?

Correct AnswerverifiedShow Answer

Which statement is NOT true of gross muscle structure?

Correct AnswerverifiedShow Answer

Muscles with the same or similar function are called ____________________.

Correct AnswerverifiedShow Answer

Depolarization of a muscle fiber is stimulated by:

Correct AnswerverifiedShow Answer

The muscle on the lateral side of the hip that abducts the thigh is the:

Correct AnswerverifiedShow Answer

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A single muscle fiber contraction is called a ,and the sustained contraction of a muscle fiber is called .

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During depolarization of a muscle fiber,there is a charge outside the membrane and a charge inside.

Correct Answer
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In a neuromuscular junction,the impulse is transmitted from the motor neuron by to the .

Correct Answer
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acetylchol...
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Two indirect energy sources for muscle contraction are and .

Correct Answer
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creatine phosphate,g...
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