Which modification of the small intestine creates a brush border appearance upon microscopic examination?
A) microvilli B) plicae circulares C) villi D) circular folds
Answer: A
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Sperm cannot fertilize an egg until they _________.
A) undergo capacitation. B) undergo decapitation. C) are in the vagina for 3 days. D) lose their acrosome. E) undergo activation.
What is it about a cell that identifies it as a target cell for a hormone?
A. the presence of a receptor specific for that hormone B. its location near the gland that secretes that hormone C. the ability of the target cell to perform a specific function D. its ability to inactivate the hormone E. the size of the target cell
Blood flows from the subclavian artery into the
A. carotid artery. B. brachiocephalic artery. C. axillary artery. D. subclavian vein.
Which are characteristic of leukocytes? a: Smaller than erythrocytesb: Have a nucleusc: Have no hemoglobind: More numerous than erythrocytese: Depending on type, may or may not contain granules
A. a, b, c, d B. a, b, c, d, e C. b, c, e D. b, c, d, e E. a, b, e