Question

question 1
which of the following does the integument not synthesize or produce?
answer
melanin
vitamin d
keratin
lipids
i dont know yet

Explanation:

The integumentary system (skin, hair, nails etc.) can synthesize melanin (pigment - giving cells in skin), produce vitamin D when exposed to sunlight, and produce keratin (a protein in hair, nails and outer skin layer). Lipids are not synthesized by the integument.

Answer:

D. Lipids