Acne is caused by

A. testosterone.
B. sebum.
C. abnormal keratinization of hair follicles.
D. Propionibacterium.
E. All of these are factors.


E

Anatomy & Physiology

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Groups of muscles are separated by which of the following?

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Depth perception relies on what kind of field of vision?

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What are the reproductive organs that produce gametes and hormones?

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