Exposure to UV radiation causes the skin to darken by increasing the production of:
A)keratin.
B)hemoglobin.
C)collagen.
D)melanin.

Question

Quizplus · Accepted Answer

UV radiation stimulates the production of melanin in the skin, which leads to a darker complexion. Keratin is a structural protein found in the skin, hair, and nails. Hemoglobin is a protein that carries oxygen in the blood and does not affect skin coloration. Collagen is a protein found in the skin, bones, and cartilage that provides structural support but does not affect skin coloration.

Exposure to UV Radiation Causes the Skin to Darken by Increasing