Chapter 11: How do the prime mover, antagonist, synergist, and fixator work together in a muscle group to produce movements?

Question 1

The muscle that is directly for responsible for producing a desired movement

Answer 1

Prime mover (agonist)

Question 2

The muscle that has an action opposite the agonist and yields to the movement of the agonist

Answer 2

Antagonist

Question 3

As the ____ contracts, the _____ stretches

Answer 3

agonist

antagonist

Question 4

The agonist and antagonist are located on _______ of the body or joint

a) same side of the body
b) opposite sides of the body

Answer 4

b

Question 5

T/F

The role of an agonist can switch for different movements

Answer 5

True! Such as in extension/flexion

Question 6

What is a muscle that assists the agonist by reducing the undesired action or unnecessary movement?

Answer 6

Synergist

Question 7

The synergist is usually _____ to the ____

a) distant, agonist
b) close, antagonist
c) close, agonist

Answer 7

c

Question 8

A ____ is the muscle that stabilizes the origin of an agonist so it can move more efficiently

Answer 8

fixator

Question 9

A fixator steadies the ____ end of a limb while movements occur at the ____ end

a) proximal; distal
b) distal; distal
c) distal; proximal
d) proximal; proximal

Answer 9

a

Question 10

Define “Compartment”

Answer 10

in the limbs, it is a group of skeletal muscles and their associated blood vessels and nerves, all of which share a common function

Question 11

What is the following an example of:
“In the upper limbs, these group of flexors muscles are located anteriorly, whereas the group of extensor muscles are located posteriorly”

Answer 11

compartment

Question 12

What is the following muscle an example of:

“The scapula is the origin for arm muscles, and muscles keep it steady when its attached muscles contract”

Answer 12

fixator

Question 13

What role does this muscle have?
“The wrist extensor muscle stabilizes the wrist joint and prevents unwanted movement while the flexor muscles of the fingers contract to bring about the primary action: efficient flexion of the fingers”

Answer 13

synergist

Question 14

Muscles can act as _____ under different conditions for different movements:

a) prime movers and antagonists
b) agonists and antagonists
c) synergists, antagonists, and prime movers
d) fixators, synergists, prime movers, and agonists

Answer 14

d