Sebum is a secretion that
A. cools the skin and eliminates certain drugs.
B. lubricates skin and helps defend against bacteria.
C. maintains water balance through waterproofing the skin.
D. acts as a pheremone once reproductive maturity is reached.
B
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What is an advantage of the electron microscope over the compound light microscope?
A) It can function in complete darkness. B) It is older, more reliable technology. C) It is less expensive. D) It allows much greater magnification of a specimen. E) It is portable.
Near the level of vertebra L4, the aorta branches to form the ________ arteries
A) common carotid B) common iliac C) femoral D) tibial E) popliteal
Explain the differences between metabolites and nutrients
What will be an ideal response?
Allergic contact dermatitis following skin contact with poison ivy would normally lead to ________
A) immediate hypersensitivity B) acute hypersensitivity C) delayed hypersensitivity D) anaphylactic shock E) immunodeficiency