Human AP Final Exam Review CH. 10

What is a prime mover (agonist)?

Muscle mainly responsible for a specific movement.

What is an antagonist muscle?

Muscle that opposes or reverses a movement.

In elbow flexion, which muscle is the agonist?

Biceps.

In elbow flexion, which muscle is the antagonist?

Triceps.

In elbow extension, which muscle is the agonist?

Triceps.

In elbow extension, which muscle is the antagonist?

Biceps.

What does a synergist do?

Helps the prime mover and adds force or reduces unwanted motion.

What is a fixator?

A synergist that stabilizes a bone or origin.

What is a circular muscle arrangement?

Fascicles form rings (e.g., around mouth).

What is a convergent muscle?

Broad origin, narrow insertion (e.g., pectoralis major).

What is a parallel muscle?

Fascicles run along muscle’s length.

What is fusiform muscle shape?

Spindle-shaped with a belly.