TYPES OF PRIMARY MUSCLE ACTIONS

Question 1

Agonist (Prime Mover)

Answer 1

Contraction produces a particular movement

Question 2

Example of agonist:

Answer 2

Biceps femoris flexes the leg at knee joint

Question 3

Synergist

Answer 3

Assists prime mover in performing an action

Question 4

Example of synergist:

Answer 4

Semitendinosus also flexes the leg at knee joint

Question 5

Antagonist

Answer 5

Opposes the movement of an agonist

Question 6

Example of antagonist:

Answer 6

Quadriceps femoris extends the leg at knee joint, thus opposes movement of the biceps femoris and semitendinosus