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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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
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
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.
Blood flows from the subclavian artery into the
A. carotid artery. B. brachiocephalic artery. C. axillary artery. D. subclavian vein.