Sperm are formed directly from the maturation of ____

a. sperm mother cells
b. spermatids
c. spermatogonia
d. primary spermatocytes
e. secondary spermatocytes


ANSWER: b

Biology & Microbiology

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Bronchial washing collected with a double lumen–plugged catheter is:

a. acceptable. b. not acceptable.

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What will be an ideal response?

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Dark Field Microscopy

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About 180 liters of blood plasma is filtered into human nephrons per day and, of that amount, about 2-3 liters leaves the body as urine. Therefore, the percentage of plasma filtrate that leaves as urine each day is about ________.

A. 0.1-0.2 percent B. 0.5-1.0 percent C. 1-2 percent D. 5-10 percent E. 10-20 percent F. 20-50 percent

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