chapter 10: the muscular system

Question 1

3 main functional groups of muscles

Answer 1

prime mover (agonist)
antagonist
synergist
fixators*

Question 2

function of the prime mover

Answer 2

holds major responsibility for producing a specific movement

Question 3

function of the antagonist

Answer 3

muscles that oppose, or reverse a particular movement
may also help to regulate the action of a prime mover by providing resistance

Question 4

function of the synergist

Answer 4

help prime movers by adding extra force to the same movements or by reducing undesirable/ unnecessary movements

During forearm flexion, for example lifting a cup, a muscle called the biceps brachii is the prime mover. Because it can be assisted by the brachialis, the brachialis is called a synergist in this action

Question 5

function of the fixator