The Three Active Forms of Vitamin a in Our Bodies

question 33

Multiple Choice

The three active forms of vitamin A in our bodies (retinol, retinal, and retinoic acid) are collectively referred to as the

• A) carotenoids.
• B) retinoids.
• C) free radicals.
• D) antioxidants.

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Definitions:

Bursa

A fluid-filled sac located in areas where friction occurs, serving as a cushion between bones and tendons or muscles around a joint.

Arthroplasty

A surgical procedure to restore the function of a joint by resurfacing the bones or replacing the joint with artificial components.

Arthrodesis

A surgical procedure to fuse the bones in a joint, eliminating the joint to alleviate pain.

Arthritis

An autoimmune or degenerative condition that results in the swelling, pain, and limited movement of the joints.