Acne is caused by
A. testosterone.
B. abnormal keratinization of hair follicles.
C. Propionibacterium.
D. sebum.
E. All of the choices are correct.
Answer: E
Anatomy & Physiology
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The mucous membranes of the nasal cavity moisten inspired air to ________ humidity.
A. 40% B. 60% C. 80% D. 100%
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The sharp, horn-covered, bony projection from the shank of some species of male birds is a/an ____________
Fill in the blank(s) with correct word
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After shedding the zona pellucida, the outermost cells of the blastocyst differentiate to form the __________
Fill in the blank with the correct word.
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Most body water is located
A) inside cells. B) in plasma. C) in interstitial fluid. D) in lumens of organs open to the outside.
Anatomy & Physiology