Which of the Following Vitamins Is Needed for Healthy Skin

question 20

Multiple Choice

Which of the following vitamins is needed for healthy skin and to maintain vision in dim light?

• A) Vitamin A
• B) Vitamin D
• C) Vitamin E
• D) Vitamin K

---

Definitions:

Target Cells

Specific cells affected by hormones or other agents due to the presence of receptors pertinent to the substance in question.

Local Regulators

Prostaglandins (a group of local hormones), growth factors, cytokines, and other soluble molecules that act on nearby cells by paracrine regulation or act on the cells that produce them (autocrine regulation).

GABA

Gamma-aminobutyric acid, a neurotransmitter in the brain that inhibits nerve transmission, promoting calm and reducing neural activity.

Endocrine Glands

Organs in the body that secrete hormones directly into the bloodstream to regulate various bodily functions.