The stage of the Plasmodium parasite that is transmitted to humans by the bite of a mosquito is the ________
a. merozoite
b. gametocyte
c. sporozoite
d. zygote
c
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Disruption of neural signaling can produce profound changes in mood and behavior. Cocaine exerts its effects by
A. blocking dopamine reuptake from synapses. B. blocking serotonin reuptake from synapses. C. preventing neurotransmitter vesicle fusion with presynaptic neuron membranes. D. blocking the enzyme acetylcholinesterase. E. binding to the GABA receptor to enhance inhibitory neurotransmission.
The human heart
a. contracts as a result of stimuli from the sinoatrial node. b. contracts only as a result of nerve stimulation from the central nervous system. c. is activated primarily through the autonomic nervous system. d. rate is primarily under the control of the atrioventricular node. e. is independent of all nervous control
Pheromones are used primarily for
a. signaling target cells in the vicinity of the secreting cells. b. stimulating transmitter release at certain synapses. c. integrating social behavior in a population. d. causing a response in a part of the body some distance from the site of secretion. e. all of these, depending on the species.
The most significant finding from the "split brain" patients studied by Roger Sperry and his collaborators was that
A. in most human brains, the left hemisphere is specialized for processing verbal and symbolic material; the right hemisphere is specialized for visuospatial and emotional processing. B. the right and left hemispheres are mirror images of each other and equally dominant in producing and understanding language in humans. C. to evaluate the functional capacity of each hemisphere in split-brain patients, it is essential to provide information to one side of the brain only. D. the severing of the corpus callosum is a necessary and effective remedy for halting grand mal seizures in epilepsy.