Which of the following is NOT a barrier function of the integument?

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A
Incorrect; there is a better answer. The synthesis of vitamin D occurs at the integument from the absorption of ultraviolet radiation and conversion of cholesterol into vitamin D.
B
Incorrect; there is a better answer. The synthesis of melanin occurs from the synthesis of electromagnetic radiation, for protection of the skin.
C
Incorrect; there is a better answer. The integument also has a bio-metabolism role in processing cutaneously absorbed molecules and an immuno-regulatory role in cutaneous antigen recognition.
D
Correct. The integument is involved in each of these non-barrier functions.

Which of the Following Is NOT a Barrier Function of the Integument