Question 1

The supraspinatus is named for its location on the posterior aspect of the scapula above the spine. What is its action?

Accepted Answer

A)   to flex and adduct the humerus and to act as a synergist of the pectoralis major
B)   to help hold the head of the humerus in the glenoid cavity and rotate the humerus laterally
C)   to initiate abduction of the arm, to stabilize the shoulder joint and to help prevent downward dislocation of the humerus
D)   to extend and medially rotate the humerus and to act as a synergist of the latissimus dorsi

Question 2

How does an antagonist differ from a prime mover (agonist)? How is it the same?

Accepted Answer

A prime mover is the muscle that causes ...

Question 3

The__________ helps keep food between the grinding surfaces of the teeth during chewing.

Accepted Answer

A)   risorius
B)   buccinator
C)   mentalis
D)   orbicularis oris

Question 4

__________is a powerful forearm extensor at the elbow joint.

Accepted Answer

A)   Brachialis
B)   Biceps brachii
C)   Triceps brachii
D)   Brachioradialis

Question 5

How can a lever system work at a mechanical disadvantage but still be of use to us?

Accepted Answer

A lever that operates with the load far ...

Question 6

A wide receiver for a college football team pulled a hamstring muscle. What muscles could be affected and what would the effect be?

Accepted Answer

The muscles include the biceps femoris, ...

Question 7

Muscles that help maintain upright posture are fixators.

Accepted Answer

A) True 
 B)False

Question 8

The__________ is the main chewing muscle.

Accepted Answer

A)   masseter
B)   hyoglossus
C)   lateral pterygoid
D)   buccinator

Question 9

What is the major factor controlling how levers work?

Accepted Answer

A)   the structural characteristics of the muscles of the person using the lever
B)   the difference in the positioning of the effort, load, and fulcrum
C)   the direction the load is being moved
D)   the weight of the load

Question 10

In general, a muscle that crosses on the anterior side of a joint produces__________ .

Accepted Answer

A)   adduction
B)   extension
C)   abduction
D)   flexion

Question 11

The calcaneal tendon (Achilles tendon) is the largest tendon in the body.

Accepted Answer

A) True 
 B)False

Question 12

Which of the following best describes the orbicularis oris?

Accepted Answer

A)   It closes, purses, and protrudes the lips.
B)   It closes the eye.
C)   It draws the eyebrows together.
D)   It pulls the lower lip down and back.

Question 13

The quadriceps femoris is composed of three "vastus" muscles and the__________ .

Accepted Answer

A)   rectus femoris
B)   semitendinosus
C)   semimembranosus
D)   biceps femoris

Question 14

Damage to the ischiocavernosus muscle would have what effect?

Accepted Answer

In the male, it would be impos...

Question 15

Which of the following muscles fixes and stabilizes the pelvis during walking?

Accepted Answer

A)   internal oblique
B)   transversus abdominis
C)   external oblique
D)   rectus abdominis

Question 16

Muscles connecting to the hyoid bone are important for swallowing and speech.

Accepted Answer

A) True 
 B)False

Question 17

Muscles that help to maintain posture are best described as synergists.

Accepted Answer

A) True 
 B)False

Question 18

The soleus is an antagonist of the gastrocnemius during plantar flexion.

Accepted Answer

A) True 
 B)False

Question 19

In emphysema, the lungs become overdistended with trapped air, which increases the effort required for breathing. Describe the muscles involved when breathing becomes a forced process, such as a patient who has emphysema.

Accepted Answer

During forced inspiration, the scalenes ...

Question 20

Although all skeletal muscles have different shapes, the fascicle arrangement of each muscle is exactly the same.

Accepted Answer

A) True 
 B)False

Exam 10: The Muscular System

The__________ is the main chewing muscle.

Correct AnswerverifiedShow Answer

Which of the following best describes the orbicularis oris?

Correct AnswerverifiedShow Answer

__________is a powerful forearm extensor at the elbow joint.

Correct AnswerverifiedShow Answer

A wide receiver for a college football team pulled a hamstring muscle. What muscles could be affected and what would the effect be?

Correct AnswerverifiedThe muscles include the biceps femoris, ...View AnswerShow Answer

Muscles that help to maintain posture are best described as synergists.

Correct AnswerverifiedShow Answer

What is the major factor controlling how levers work?

Correct AnswerverifiedShow Answer

In general, a muscle that crosses on the anterior side of a joint produces__________ .

Correct AnswerverifiedShow Answer

In emphysema, the lungs become overdistended with trapped air, which increases the effort required for breathing. Describe the muscles involved when breathing becomes a forced process, such as a patient who has emphysema.

Correct AnswerverifiedDuring forced inspiration, the scalenes ...View AnswerShow Answer

Muscles that help maintain upright posture are fixators.

Correct AnswerverifiedShow Answer

Although all skeletal muscles have different shapes, the fascicle arrangement of each muscle is exactly the same.

Correct AnswerverifiedShow Answer

Muscles connecting to the hyoid bone are important for swallowing and speech.

Correct AnswerverifiedShow Answer

The supraspinatus is named for its location on the posterior aspect of the scapula above the spine. What is its action?

Correct AnswerverifiedShow Answer

How can a lever system work at a mechanical disadvantage but still be of use to us?

Correct AnswerverifiedA lever that operates with the load far ...View AnswerShow Answer

Damage to the ischiocavernosus muscle would have what effect?

Correct AnswerverifiedIn the male, it would be impos...View AnswerShow Answer

The quadriceps femoris is composed of three "vastus" muscles and the__________ .

Correct AnswerverifiedShow Answer

How does an antagonist differ from a prime mover (agonist)? How is it the same?

Correct AnswerverifiedA prime mover is the muscle that causes ...View AnswerShow Answer

The soleus is an antagonist of the gastrocnemius during plantar flexion.

Correct AnswerverifiedShow Answer

Which of the following muscles fixes and stabilizes the pelvis during walking?

Correct AnswerverifiedShow Answer

The__________ helps keep food between the grinding surfaces of the teeth during chewing.

Correct AnswerverifiedShow Answer

The calcaneal tendon (Achilles tendon) is the largest tendon in the body.

Correct AnswerverifiedShow Answer

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The muscles include the biceps femoris, ...
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Correct Answer
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Correct Answer
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Correct Answer
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During forced inspiration, the scalenes ...
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Correct Answer
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A lever that operates with the load far ...
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In the male, it would be impos...
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A prime mover is the muscle that causes ...
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