Synaptic vesicles discharge their contents by exocytosis at the

A. dendrite.
B. axon hillock.
C. nodes of Ranvier.
D. postsynaptic membrane.
E. presynaptic membrane.


E. presynaptic membrane.

Biology & Microbiology

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In the above figure, which letter points to the prostate gland?

A) A B) B C) C D) D E) E

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In the lower leg, the gastrocnemius muscle bends the foot away from the knee, as in pointing one's toes. The tibialis anterior muscle flexes the foot toward the knee. These two muscles are

A) synergistic. B) homeostatic. C) mutualistic. D) antagonistic. E) cooperative.

Biology & Microbiology

Oxygen and carbon dioxide diffuse in and out of a leaf through the

a) palisade mesophyll. b) guard cells. c) xylem. d) stomata.

Biology & Microbiology

One function of antibodies is to ________

A) deactivate defensive proteins
B) stimulate the production of antigens
C) phagocytose invading bacteria
D) clump invader cells

Biology & Microbiology