Question 1

What muscle works in a pair with the biceps brachii?

Accepted Answer

A)   the triceps brachii
B)   the trapezius
C)   the masseter
D)   the pectoralis major
E)   the sartoriusF) C) and D)
G) A) and C)

Question 2

Jillian is a cross country runner.She has predominantly slow-twitch muscle fibers.

Accepted Answer

A) True 
 B)False

Question 3

Which disease is an autoimmune disease characterized by weakness that especially affects the muscles of the eyelids,face,neck,and extremities?

Accepted Answer

A)   myalgia
B)   muscular dystrophy
C)   myasthenia gravis
D)   tendinitis
E)   bursitisF) C) and D)
G) A) and E)

Question 4

Which of the following is not a function of skeletal muscles?

Accepted Answer

A)   pumping of blood throughout the body
B)   support
C)   movement of bones
D)   maintenance of body temperature
E)   protection of internal organsF) C) and D)
G) D) and E)

Question 5

When the nerve signal reaches the axon terminal what happens next?

Accepted Answer

A)   The muscle contracts.
B)   The synaptic vesicles release neurotransmitter.
C)   An electrical signal is formed that jumps the synaptic cleft.
D)   H+ is pumped into the synaptic cleft.
E)   Myosin is released from the axon terminal.F) D) and E)
G) C) and D) B

Question 6

Which of the following is not a phase of a single muscle twitch?

Accepted Answer

A)   stimulation period
B)   latent period
C)   contraction period
D)   relaxation periodE) C) and D)
F) A) and D)

Question 7

Which part of the cardiovascular system does not include muscle?

Accepted Answer

A)   heart
B)   arteries
C)   veins
D)   capillariesE) A) and D)
F) C) and D)

Question 8

What is the deltoid muscle shaped like?

Accepted Answer

A)   a long thin line
B)   a square
C)   a triangle
D)   a circle
E)   a trapezoidF) A) and E)
G) B) and E)

Question 9

Which of the following is not a term that refers to how muscles work?

Accepted Answer

A)   prime mover
B)   synergists
C)   antagonist
D)   synergism
E)   originF) C) and E)
G) B) and D)

Question 10

Which of the following does not occur when a muscle fatigues?

Accepted Answer

A)   Its energy reserves are depleted.
B)   Stimulation continues.
C)   Tetanus is achieved.
D)   Acetylcholine is crossing the synaptic cleft.
E)   The muscle relaxes.F) B) and E)
G) C) and D) C

Question 11

Of the three types of muscle tissue,which is voluntary?

Accepted Answer

A)   smooth muscle
B)   cardiac muscle
C)   skeletal muscleD) A) and B)
E) B) and C)

Question 12

What is the reservoir for Ca2+ in the body?

Accepted Answer

A)   muscles
B)   bones
C)   liver
D)   brain
E)   bloodF) A) and B)
G) D) and E)

Question 13

What is the name of the muscle that is responsible for blinking and winking?

Accepted Answer

A)   latissimus dorsi
B)   trapezius
C)   pectoralis major
D)   orbicularis oculi
E)   extensor digitorumF) B) and C)
G) A) and E)

Question 14

Which of the following is not an energy source for muscle contraction?

Accepted Answer

A)   glycogen
B)   triglycerides
C)   glucose
D)   fatty acids
E)   starchF) B) and D)
G) None of the above

Question 15

Of the three types of muscle tissue,which has multinucleated fibers?

Accepted Answer

A)   smooth muscle
B)   cardiac muscle
C)   skeletal muscleD) B) and C)
E) A) and B)

Question 16

What do fibromyalgia and amyotrophic lateral sclerosis have in common?

Accepted Answer

A)   The cause of both diseases is unknown.
B)   In both diseases, antibodies destroy acetylcholine receptors.
C)   Both are X-linked genetic diseases.
D)   Both can be cured with antibiotics.
E)   In both diseases, the protein dystrophin is absent.F) A) and E)
G) All of the above A

Question 17

Because the heart beats continuously,cardiac fibers never relax completely.

Accepted Answer

A) True 
 B)False

Question 18

Several of the structures in the muscle cell are given special names.For example,the cytoplasm of a muscle fiber is called the sarcoplasm.Which of the following is truly a unique structure to muscle cells (not just a renamed one) ?

Accepted Answer

A)   cytoplasm
B)   nucleus
C)   endoplasmic reticulum
D)   transverse (T)  system
E)   plasma membraneF) B) and E)
G) C) and E)

Question 19

The skeletal system assists the cardiovascular system by

Accepted Answer

A)   altering the pH of the blood.
B)   activating vitamin D needed for calcium absorption.
C)   producing hormones for calcium homeostasis.
D)   pumping the blood.
E)   producing the blood cells.F) None of the above
G) A) and E)

Question 20

What does troponin bind to and what happens when it binds?

Accepted Answer

A)   Ca2+, tropomyosin shifts
B)   tropomyosin, the sarcomere relaxes
C)   acetylcholine, the sarcome shortens
D)   ATP, tropomyosin returns to normal position
E)   T tubules, the sarcomere shortensF) B) and E)
G) D) and E)

Exam 12: Muscular System

What muscle works in a pair with the biceps brachii?

Correct AnswerverifiedShow Answer

Jillian is a cross country runner.She has predominantly slow-twitch muscle fibers.

Correct AnswerverifiedShow Answer

Which disease is an autoimmune disease characterized by weakness that especially affects the muscles of the eyelids,face,neck,and extremities?

Correct AnswerverifiedShow Answer

Which of the following is not a function of skeletal muscles?

Correct AnswerverifiedShow Answer

When the nerve signal reaches the axon terminal what happens next?

Correct AnswerverifiedB

Which of the following is not a phase of a single muscle twitch?

Correct AnswerverifiedShow Answer

Which part of the cardiovascular system does not include muscle?

Correct AnswerverifiedShow Answer

What is the deltoid muscle shaped like?

Correct AnswerverifiedShow Answer

Which of the following is not a term that refers to how muscles work?

Correct AnswerverifiedShow Answer

Which of the following does not occur when a muscle fatigues?

Correct AnswerverifiedC

Of the three types of muscle tissue,which is voluntary?

Correct AnswerverifiedShow Answer

What is the reservoir for Ca2+ in the body?

Correct AnswerverifiedShow Answer

What is the name of the muscle that is responsible for blinking and winking?

Correct AnswerverifiedShow Answer

Which of the following is not an energy source for muscle contraction?

Correct AnswerverifiedShow Answer

Of the three types of muscle tissue,which has multinucleated fibers?

Correct AnswerverifiedShow Answer

What do fibromyalgia and amyotrophic lateral sclerosis have in common?

Correct AnswerverifiedA

Because the heart beats continuously,cardiac fibers never relax completely.

Correct AnswerverifiedShow Answer

Several of the structures in the muscle cell are given special names.For example,the cytoplasm of a muscle fiber is called the sarcoplasm.Which of the following is truly a unique structure to muscle cells (not just a renamed one) ?

Correct AnswerverifiedShow Answer

The skeletal system assists the cardiovascular system by

Correct AnswerverifiedShow Answer

What does troponin bind to and what happens when it binds?

Correct AnswerverifiedShow Answer

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B

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C

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What is the reservoir for Ca²⁺ in the body?

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A

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