Quiz - Chapter 5 - Muscular System

Question 1

The majority of lower extremity functional activity occurs in a closed chain manner.

A. True
B. False

Answer 1

A. True

Question 2

The ability of a muscle to recoil or return to normal resting length after a stretching or shortening force is removed is called
A. irritability.
B.contractility.
C. elasticity.
D. extensibility.

Answer 2

C. elasticity.

Question 3

A contraction that causes no joint movement while producing muscle fiber tension is
A. ISOK.
B. ISOT.
C. ISOM.
D. eccentric.

Answer 3

C. ISOM.

Question 4

The deltoid muscle can effectively contract through its entire ROM because of the upward rotation of the scapula, which serves to maintain tension in the deltoid muscle. If the deltoid loses tension, it becomes
A. passively insufficient.
B. actively insufficient.
C. noncontractile.
D. None of the above

Answer 4

B. actively insufficient.

Question 5

What is the term for a muscle contraction in which the proximal end moves toward the distal end?
A.Irritability
B. Extensibility
C.Reversal of muscle action
D. Active insufficiency

Answer 5

C.Reversal of muscle action

Question 6

Which of the following is a true statement regarding oblique muscle fibers?
A. Oblique muscle fibers tend to be longer than parallel fibers, thus having more strength potential than parallel fibers.
B. Oblique muscle fibers tend to be longer than parallel fibers, thus having less strength potential than parallel fibers.
C. Oblique muscle fibers tend to be shorter than parallel fibers, thus having more strength potential than parallel fibers.
D. Oblique muscle fibers tend to be shorter than parallel fibers, thus having less strength potential than parallel fibers.

Answer 6

C. Oblique muscle fibers tend to be shorter than parallel fibers, thus having more strength potential than parallel fibers.

Question 7

You can make a tighter fist with your wrist extended than with your wrist flexed because of
Correct!
A. active insufficiency of the finger flexors.
B. active insufficiency of the finger extensors.
C. passive insufficiency of the finger flexors.
D. passive insufficiency of the finger extensors.

Answer 7

A. active insufficiency of the finger flexors.

Question 8

If a person threw a Frisbee and wanted wrist radial deviation, which muscle group would be the antagonist?
A.Wrist radial deviators
B. Wrist ulnar deviators
C. Wrist flexors
D. Wrist extensors

Answer 8

B. Wrist ulnar deviators

Question 9

Which of the following is NOT true of an eccentric contraction?
A. Contraction produces a greater force than a concentric contraction.
B. Contraction is used as an acceleration activity.
C. Muscle attachments move farther apart.
D. Movement occurs with gravity.

Answer 9

B. Contraction is used as an acceleration activity.

Question 10

The type of muscle contraction that occurs with fixed speed, fixed resistance, and no joint motion is
A. ISOK.
B. ISOM.
C. ISOT.
D. tenodesis.

Answer 10

B. ISOM.

Question 11

The ability of a muscle to respond to a stimulus is referred to as which of the following?

A. Irritability
B. Contractility
C. Extensibility
D. Elasticity

Answer 11

A. Irritability

Question 12

Which of the following is NOT true of a concentric contraction?
A. Muscle attachments move closer together.
Correct!
B. This type of contraction produces less of a force than an eccentric contraction.
C. Movement occurs against gravity.
D. A concentric contraction is an acceleration activity.

Answer 12

B. This type of contraction produces less of a force than an eccentric contraction.