Question 1

Anaerobic respiration produces a by-product called ____________________ that leads to muscle ____________________.

Accepted Answer

The answer of Anaerobic respiration produces a by-product called ____________________...

Question 2

What is the delicate connective tissue that covers each muscle fiber?

Accepted Answer

A)   Endomysium
B)   Epimysium
C)   Perimysium
D)   PeriosteumE) B) and D)
F) B) and C) A

Question 3

What is an aponeurosis?

Accepted Answer

A)   A strong,fibrous cord that attaches muscle to bone
B)   Connective tissue that covers each muscle fiber
C)   Connective tissue that surrounds the muscle outside the epimysium
D)   A flat,broad tendon that attaches muscle to another muscleE) A) and B)
F) C) and D)

Question 4

How do muscles obtain their energy after about 10 minutes of moderate exercise,and what benefit does it have over other methods?

Accepted Answer

A)   Muscles obtain their energy by metabolizing fatty acids; this is beneficial because fatty acids are plentiful.
B)   Muscles obtain their energy through anaerobic respiration of glucose; this is beneficial because anaerobic respiration can generate energy quickly.
C)   Muscles obtain their energy through aerobic respiration of glucose; this is useful because it produces more ATP than anaerobic respiration.
D)   Muscles obtain their energy by breaking down ATP; this is useful because creatine phosphate is plentiful.E) All of the above
F) B) and C)

Question 5

Between the end of a motor nerve and a muscle fiber is a narrow space called a ____________________.

Accepted Answer

The answer of Between the end of a motor nerve...

Question 6

A neuron and all the fibers it stimulates are called a ____________________.

Accepted Answer

The answer of A neuron and all the fibers it...

Question 7

Thick myofilaments consist of a protein called ____________________,whereas thin myofilaments consist of a protein called ____________________.

Accepted Answer

The answer of Thick myofilaments consist of a protein called...

Question 8

Most skeletal muscles remain in a state of

Accepted Answer

A)   relaxation.
B)   treppe.
C)   incomplete tetanus.
D)   complete tetanus.E) A) and D)
F) A) and B)

Question 9

In the disease myasthenia gravis,the body produces antibodies against receptors for acetylcholine (ACh) .As a result,not all ACh can find a receptor.Based on your knowledge of how muscle contraction occurs,what key symptoms would you expect to see and why?

Accepted Answer

A)   Paralysis,because all ACh must be bound to a receptor for contraction to occur
B)   Tetany,because the muscle will fire excessively as the ACh attempts to find a receptor
C)   Weakness,because not all of the AChs will find a receptor,resulting in poor nerve transmission
D)   Muscle spasms,because the ACh remaining in the synaptic cleft will irritate the receiving nerveE) B) and C)
F) A) and B)

Question 10

The connective tissue surrounding the muscle outside the epimysium is called ____________________.

Accepted Answer

The answer of The connective tissue surrounding the muscle outside...

Question 11

What is the chief function of T tubules?

Accepted Answer

A)   They allow electrical impulses to travel deep into the cell.
B)   They store the calcium ions necessary for muscle contraction.
C)   They contain myofilaments necessary for muscle contraction.
D)   They store glycogen and oxygen.E) A) and D)
F) A) and C) A

Question 12

In an ____________________ contraction,the tension in the muscle increases whereas its length remains the same.

Accepted Answer

isometric

Question 13

Which statement correctly describes the sequence of events in muscle contraction?

Accepted Answer

A)   An impulse triggers the release of acetylcholine (ACh) ,which diffuses across the synaptic cleft to stimulate the sarcolemma to release ATP.The ATP triggers the actin and myosin filaments to shorten,and muscle contraction occurs.
B)   An impulse triggers the release of acetylcholinesterase into the synaptic cleft.This causes calcium ions to be pumped into the T tubules.The calcium allows the myosin heads to latch on to the actin filaments and muscle contraction occurs.
C)   An impulse triggers the release of acetylcholine (ACh) ,which diffuses across the synaptic cleft to stimulate the T tubules to release calcium.The calcium binds with troponin on the actin filaments,which permits the myosin heads to latch on and muscle contraction occurs.
D)   An impulse triggers the release of acetylcholine (ACh) .This stimulates the sarcolemma,which sends an impulse to the actin and myosin filaments.The myosin heads then latch on to the actin filaments,pulling the Z disks closer together,and muscle contraction occurs.E) A) and C)
F) A) and D)

Question 14

The epimysium of a muscle sometimes extends past as a flat sheet of connective tissue called an ____________________ that then fuses with the covering of another muscle.

Accepted Answer

The answer of The epimysium of a muscle sometimes extends...

Question 15

Which of the following correctly describes skeletal muscle?

Accepted Answer

A)   It is known as voluntary muscle.
B)   It consists of short,branching fibers that fit together at intercalated discs.
C)   It is found in the digestive tract,blood vessels,and airways.
D)   It is called nonstriated because it does not appear striped when examined under a microscope.E) A) and C)
F) A) and D)

Question 16

The end of the muscle that attaches to the more stationary bone is called the ____________________,whereas the end with the more mobile attachment is called the ____________________.

Accepted Answer

The answer of The end of the muscle that attaches...

Question 17

What are fascicles?

Accepted Answer

A)   Muscle cells
B)   Groups of muscle fibers
C)   Types of tendons
D)   Neurons that innervate musclesE) A) and C)
F) A) and B)

Question 18

Which factor influences the strength with which a muscle fiber contracts?

Accepted Answer

A)   The amount of acetylcholine released into the synaptic cleft
B)   The amount of calcium released
C)   The length of the muscle fiber before the contraction begins
D)   The size of the muscle fiberE) None of the above
F) A) and D)

Question 19

If impulses reach a muscle fiber so rapidly that fibers don't have a chance to relax completely before the next impulse arrives,what condition will occur?

Accepted Answer

A)   Twitch
B)   Treppe
C)   Incomplete tetanus
D)   Complete tetanusE) A) and B)
F) B) and C)

Question 20

What is the name of the connective tissue that surrounds the muscle as a whole?

Accepted Answer

A)   Endomysium
B)   Epimysium
C)   Perimysium
D)   PeriosteumE) A) and D)
F) B) and C)

Exam 9: Muscular System

Anaerobic respiration produces a by-product called ____________________ that leads to muscle ____________________.

Correct AnswerverifiedShow Answer

What is the delicate connective tissue that covers each muscle fiber?

Correct AnswerverifiedA

What is an aponeurosis?

Correct AnswerverifiedShow Answer

How do muscles obtain their energy after about 10 minutes of moderate exercise,and what benefit does it have over other methods?

Correct AnswerverifiedShow Answer

Between the end of a motor nerve and a muscle fiber is a narrow space called a ____________________.

Correct AnswerverifiedShow Answer

A neuron and all the fibers it stimulates are called a ____________________.

Correct AnswerverifiedShow Answer

Thick myofilaments consist of a protein called ____________________,whereas thin myofilaments consist of a protein called ____________________.

Correct AnswerverifiedShow Answer

Most skeletal muscles remain in a state of

Correct AnswerverifiedShow Answer

In the disease myasthenia gravis,the body produces antibodies against receptors for acetylcholine (ACh) .As a result,not all ACh can find a receptor.Based on your knowledge of how muscle contraction occurs,what key symptoms would you expect to see and why?

Correct AnswerverifiedShow Answer

The connective tissue surrounding the muscle outside the epimysium is called ____________________.

Correct AnswerverifiedShow Answer

What is the chief function of T tubules?

Correct AnswerverifiedA

In an ____________________ contraction,the tension in the muscle increases whereas its length remains the same.

Correct Answerverifiedisometric

Which statement correctly describes the sequence of events in muscle contraction?

Correct AnswerverifiedShow Answer

The epimysium of a muscle sometimes extends past as a flat sheet of connective tissue called an ____________________ that then fuses with the covering of another muscle.

Correct AnswerverifiedShow Answer

Which of the following correctly describes skeletal muscle?

Correct AnswerverifiedShow Answer

The end of the muscle that attaches to the more stationary bone is called the ____________________,whereas the end with the more mobile attachment is called the ____________________.

Correct AnswerverifiedShow Answer

What are fascicles?

Correct AnswerverifiedShow Answer

Which factor influences the strength with which a muscle fiber contracts?

Correct AnswerverifiedShow Answer

If impulses reach a muscle fiber so rapidly that fibers don't have a chance to relax completely before the next impulse arrives,what condition will occur?

Correct AnswerverifiedShow Answer

What is the name of the connective tissue that surrounds the muscle as a whole?

Correct AnswerverifiedShow Answer

Anaerobic respiration produces a by-product called that leads to muscle .

Correct Answer
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A

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Thick myofilaments consist of a protein called ,whereas thin myofilaments consist of a protein called .

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A

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isometric

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The end of the muscle that attaches to the more stationary bone is called the ,whereas the end with the more mobile attachment is called the .

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