Question 1

The thick and thin filaments in smooth muscle tissue are arranged in sarcomeres (similar to skeletal muscle), while in cardiac muscle tissue, the filaments are irregularly distributed throughout the cytoplasm.

Accepted Answer

A) True 
 B)False

Question 2

Unfused (incomplete)tetanus involves the process of wave summation.

Accepted Answer

A) True 
 B)False

Question 3

Muscle tone results from

Accepted Answer

A)  slight contraction of all the muscle fibers in a skeletal muscle.
B)  activation of a small number of motor units within a skeletal muscle.
C)  elastic tension of the connective tissue elements of the skeletal muscle.
D)  rigor mortis.
E)  tetanus.F) A) and E)
G) A) and D)

Question 4

Which of the following labeled muscles on the diagram is the soleus?

Accepted Answer

A)  H
B)  G
C)  L
D)  M
E)  PF) None of the above
G) A) and B)

Question 5

The thin filaments in skeletal muscles are composed of

Accepted Answer

A)  myosin
B)  actin
C)  actin, troponin, and myosin
D)  actin, troponin, and tropomyosin
E)  troponin and tropomyosinF) D) and E)
G) A) and D)

Question 6

Describe how both wave summation and motor unit recruitment are used to generate a maximal contraction in a skeletal muscle.

Accepted Answer

Wave summation involves rapidly stimulat...

Question 7

A muscle that decreases the size of an opening is a

Accepted Answer

A)  rotator
B)  tensor
C)  pronator
D)  sphincter
E)  depressorF) None of the above
G) B) and C)

Question 8

The most common form of inherited muscle-destroying disease in humans is

Accepted Answer

A)  amyotrophic lateral sclerosis (ALS) or Lou Gehrig's disease
B)  Duchenne muscular dystrophy (DM
D)  
C)  myasthenia gravis
D)  fasciculation
E)  multiple sclerosis (MS) F) A) and D)
G) B) and E)

Question 9

An individual sarcomere within a myofibril is the area between two

Accepted Answer

A)  Z discs
B)  I bands
C)  A bands
D)  H zones
E)  M linesF) A) and B)
G) A) and E)

Question 10

Which of the following is NOT a characteristic used to name skeletal muscles?

Accepted Answer

A)  direction of fibers
B)  thickness of fibers
C)  location
D)  size
E)  number of originsF) All of the above
G) B) and E)

Question 11

Motor units that contain a relatively high number of muscle fibers are used

Accepted Answer

A)  to lift heavy weights.
B)  where precise control is needed.
C)  to control muscles for posture.
D)  to move the eyeballs.
E)  both where precise control is needed and to move the eyeballs.F) A) and E)
G) D) and E)

Question 12

Based on its name, which of the following best describes characteristics of the biceps femoris muscle?

Accepted Answer

A)  Has two insertions and found in the leg.
B)  Has two bellies and found in the thigh.
C)  Has two origins and found in the thigh.
D)  Has two origins and found in the arm.
E)  Has two insertions and found in the thigh.F) A) and C)
G) B) and E)

Question 13

The ends of axon terminals enlarge into swellings called motor end plates.

Accepted Answer

A) True 
 B)False

Question 14

Which of the following types of muscle tissue are striated and involuntary?

Accepted Answer

A)  skeletal muscle
B)  cardiac muscle
C)  smooth muscle
D)  both skeletal muscle and cardiac muscle are correct
E)  both skeletal muscle and smooth muscle are correctF) C) and D)
G) A) and B)

Question 15

Define muscle tone.

Accepted Answer

A sustained partial contractio...

Question 16

Slow oxidative skeletal muscle fibers fatigue easily.

Accepted Answer

A) True 
 B)False

Question 17

The space between an axon terminal of a motor neuron and the sarcolemma of a muscle fiber is called the

Accepted Answer

A)  neural junction
B)  synaptic cleft
C)  synaptic vesicle
D)  motor end plate
E)  motor unitF) A) and D)
G) C) and D)

Question 18

Skeletal muscle tissue is striated and voluntary.

Accepted Answer

A) True 
 B)False

Question 19

Humans undergo a slow, progressive loss of skeletal muscle mass starting at about age

Accepted Answer

A)  20
B)  30
C)  40
D)  50
E)  60F) None of the above
G) A) and C)

Question 20

The dense irregular connective tissue that covers muscle fascicles and holds them together is called the

Accepted Answer

A)  epimysium
B)  endomysium
C)  perimysium
D)  superficial fascia
E)  deep fasciaF) D) and E)
G) None of the above

Exam 8: The Muscular System

An individual sarcomere within a myofibril is the area between two

Correct AnswerverifiedShow Answer

The space between an axon terminal of a motor neuron and the sarcolemma of a muscle fiber is called the

Correct AnswerverifiedShow Answer

Slow oxidative skeletal muscle fibers fatigue easily.

Correct AnswerverifiedShow Answer

The thick and thin filaments in smooth muscle tissue are arranged in sarcomeres (similar to skeletal muscle), while in cardiac muscle tissue, the filaments are irregularly distributed throughout the cytoplasm.

Correct AnswerverifiedShow Answer

A muscle that decreases the size of an opening is a

Correct AnswerverifiedShow Answer

The dense irregular connective tissue that covers muscle fascicles and holds them together is called the

Correct AnswerverifiedShow Answer

Skeletal muscle tissue is striated and voluntary.

Correct AnswerverifiedShow Answer

Which of the following labeled muscles on the diagram is the soleus?

Correct AnswerverifiedShow Answer

Describe how both wave summation and motor unit recruitment are used to generate a maximal contraction in a skeletal muscle.

Correct AnswerverifiedWave summation involves rapidly stimulat...View AnswerShow Answer

Define muscle tone.

Correct AnswerverifiedA sustained partial contractio...View AnswerShow Answer

Which of the following is NOT a characteristic used to name skeletal muscles?

Correct AnswerverifiedShow Answer

Which of the following types of muscle tissue are striated and involuntary?

Correct AnswerverifiedShow Answer

The ends of axon terminals enlarge into swellings called motor end plates.

Correct AnswerverifiedShow Answer

Unfused (incomplete)tetanus involves the process of wave summation.

Correct AnswerverifiedShow Answer

Motor units that contain a relatively high number of muscle fibers are used

Correct AnswerverifiedShow Answer

Muscle tone results from

Correct AnswerverifiedShow Answer

The most common form of inherited muscle-destroying disease in humans is

Correct AnswerverifiedShow Answer

Humans undergo a slow, progressive loss of skeletal muscle mass starting at about age

Correct AnswerverifiedShow Answer

The thin filaments in skeletal muscles are composed of

Correct AnswerverifiedShow Answer

Based on its name, which of the following best describes characteristics of the biceps femoris muscle?

Correct AnswerverifiedShow Answer

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Wave summation involves rapidly stimulat...
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A sustained partial contractio...
View Answer

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