Question

multiple choice question
a movement called ______ straightens a joint, increasing the angle.
extension
flexion
adduction
retraction

Explanation:

Extension is the movement that straightens a joint and increases the angle between the bones of the joint. Flexion decreases the angle at a joint. Adduction is the movement of a body part toward the mid - line of the body. Retraction is the movement of a body part backward.

Answer:

A. extension