Why does range of motion need to be measured separately for each joint?
a. the average ranges of motion of joints are not known.
b. each joint has a different range of motion.
c. range of motion can change rapidly in a joint.
d. none of the above

Answer;

B. Each joint has a different range of motion.

Explanation;

-Each joint has its own level of flexibility, expressed in degrees. Flexibility is the range of motion around a joint, and can refer to ligaments, tendons, muscles, bones, and joints. If a joint has good range of motion, then it would be able to move in all planes and directions permitted to that joint.

-This motion is influenced by several structures: configuration of bone surfaces within the joint, joint capsule, ligaments, tendons, and muscles acting on the joint.

i think the answer is b.

hope it