Question 1

Which of the following can actually shorten during a muscle contraction?

Accepted Answer

A)   myosin filament
B)   A band
C)   actin filament
D)   sarcomere
E)   myofilament

Question 2

Match the following:
-Primary action of the deltoid

Accepted Answer

A)  flexion
B)  extension
C)  rotation
D)  adduction
E)  plantar flexionF) supinationG) abductionH) inversion

Question 3

During skeletal muscle contraction, myosin heads attach to binding sites associated with ________.

Accepted Answer

A)   myosin filaments
B)   actin filaments
C)   Z discs
D)   thick filaments
E)   the H zone

Question 4

Match the following:
-The movement of a limb toward the body midline

Accepted Answer

A)  flexion
B)  extension
C)  rotation
D)  adduction
E)  plantar flexionF) supinationG) abductionH) inversion

Question 5

The deltoid is a prime mover of arm adduction.

Accepted Answer

A) True 
 B)False

Question 6

The deepest muscle of the abdominal wall is the transversus abdominis.

Accepted Answer

A) True 
 B)False

Question 7

Discuss the role of the myosin heads in sliding filament theory.

Accepted Answer

The myosin heads attach to binding sites...

Question 8

Using Figure 6.2, match the following:
-The muscle fiber (cell)  is indicated by ________.

Accepted Answer

A)   Label A
B)   Label B
C)   Label C
D)   Label D

Question 9

Match the following:
-Enzyme that breaks down acetylcholine (ACh)

Accepted Answer

A)  calcium ions
B)  acetylcholine
C)  synaptic cleft
D)  sodium ions
E)  acetylcholinesteraseF) action potential

Question 10

A muscle group that works with and assists the action of a prime mover is a(n)  ________.

Accepted Answer

A)   antagonist only
B)   fixator only
C)   synergist only
D)   antagonist and synergist
E)   antagonist and fixator

Question 11

Which of the following muscles closes the jaw?

Accepted Answer

A)   buccinator
B)   zygomaticus
C)   frontalis
D)   sternocleidomastoid
E)   both masseter and temporalis

Question 12

A sarcomere is ________.

Accepted Answer

A)   the nonfunctional unit of skeletal muscle
B)   the contractile unit between two Z discs
C)   the area between two intercalated discs
D)   the wavy lines on the cell, as seen in a microscope
E)   a compartment in a myofilament

Question 13

Bundles of muscle fibers are known as aponeuroses.

Accepted Answer

A) True 
 B)False

Question 14

Match the following:
-Type of movement that points the toes

Accepted Answer

A)  flexion
B)  extension
C)  rotation
D)  adduction
E)  plantar flexionF) supinationG) abductionH) inversion

Question 15

Cardiac and skeletal muscle both possess striations.

Accepted Answer

A) True 
 B)False

Question 16

Which of the following is an example of an isometric contraction?

Accepted Answer

A)   shaking the head as to say "no"
B)   pushing against an immovable wall
C)   bending the elbow
D)   rotating the arm
E)   nodding the head as to say "yes"

Question 17

Using Figure 6.1, match the following:
-The H zone, located within the A band, lacks thin filaments and is represented by ________.

Accepted Answer

A)   Label A
B)   Label B
C)   Label C
D)   Label D

Question 18

Acetylcholine is ________.

Accepted Answer

A)   an ion pump on the postsynaptic membrane
B)   a source of energy for muscle contraction
C)   a component of thick myofilaments
D)   an oxygen-binding protein
E)   a neurotransmitter that stimulates skeletal muscle

Question 19

The condition of skeletal muscle fatigue can be best explained by ________.

Accepted Answer

A)   the all-or-none law
B)   the inability to generate sufficient quantities of ATP due to feedback regulation of synthesis
C)   insufficient intracellular quantities of ATP due to excessive consumption
D)   a total lack of ATP
E)   inadequate numbers of mitochondria

Question 20

Which type of muscle tissue contracts most quickly upon stimulation?

Accepted Answer

A)   skeletal
B)   visceral
C)   cardiac
D)   smooth
E)   tendons

Exam 6: The Muscular System

Which type of muscle tissue contracts most quickly upon stimulation?

Correct AnswerverifiedShow Answer

Acetylcholine is ________.

Correct AnswerverifiedShow Answer

Which of the following muscles closes the jaw?

Correct AnswerverifiedShow Answer

Discuss the role of the myosin heads in sliding filament theory.

Correct AnswerverifiedThe myosin heads attach to binding sites...View AnswerShow Answer

Bundles of muscle fibers are known as aponeuroses.

Correct AnswerverifiedShow Answer

Match the following: -Enzyme that breaks down acetylcholine (ACh)

Correct AnswerverifiedShow Answer

Match the following: -The movement of a limb toward the body midline

Correct AnswerverifiedShow Answer

Match the following: -Type of movement that points the toes

Correct AnswerverifiedShow Answer

Which of the following can actually shorten during a muscle contraction?

Correct AnswerverifiedShow Answer

A sarcomere is ________.

Correct AnswerverifiedShow Answer

Match the following: -Primary action of the deltoid

Correct AnswerverifiedShow Answer

A muscle group that works with and assists the action of a prime mover is a(n) ________.

Correct AnswerverifiedShow Answer

Using Figure 6.1, match the following: -The H zone, located within the A band, lacks thin filaments and is represented by ________.

Correct AnswerverifiedShow Answer

Which of the following is an example of an isometric contraction?

Correct AnswerverifiedShow Answer

Cardiac and skeletal muscle both possess striations.

Correct AnswerverifiedShow Answer

The condition of skeletal muscle fatigue can be best explained by ________.

Correct AnswerverifiedShow Answer

During skeletal muscle contraction, myosin heads attach to binding sites associated with ________.

Correct AnswerverifiedShow Answer

The deepest muscle of the abdominal wall is the transversus abdominis.

Correct AnswerverifiedShow Answer

The deltoid is a prime mover of arm adduction.

Correct AnswerverifiedShow Answer

Using Figure 6.2, match the following: -The muscle fiber (cell) is indicated by ________.

Correct AnswerverifiedShow Answer

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The myosin heads attach to binding sites...
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