Where is the Broca's area?
A. Frontal lobe
B. Occipital lobe
C. Temporal lobe
D. Parietal lobe
Answer: A
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The onset of AIDS, after infection, can take up to ten years.
a. true b. false
Select the answer that correctly orders the events that occur when a nerve signal reaches the axon terminal.(1) The neurotransmitters bind to receptors on the postsynaptic cell.(2) The postsynaptic cell is stimulated to initiate a nerve signal.(3) Synaptic vesicles release neurotransmitters via exocytosis.(4) Neurotransmitters diffuse across synaptic cleft.
A. 1, 2, 3, 4 B. 2, 3, 4, 1 C. 3, 4, 1, 2 D. 4, 3, 1, 2 E. 2, 3, 1, 4
G-proteins are bound to ____
a. glucose b. guanine nucleotides c. glutathione d. gyroscopic proteins e. gamma phosphate
Rhodopsin
a. is the photopigment found in the red cones. b. consists of an opsin and retinal c. is most highly concentrated in the fovea. d. is slowly broken down in the absence of light. e. contains a derivative of vitamin B12.