35) When depolarization reaches the axon terminal of a presynaptic neuron, the n

Question

35) When depolarization reaches the axon terminal of a presynaptic neuron, the next event is A) immediate release of neurotransmitter. B) uptake of neurotransmitter from the synaptic cleft. C) diffusion of calclum ions out of the cell. D) diffusion of calcium ions into the cell. E) active transport of calclum ions out of the cell. 36) Most excitatory neurons in the CNS communicate via the neurotransmitter C) GABA. D) glutamate. E dopamine. Summation results from buildup of neurotransmitter released simultaneously by several presynaptic neurons, this is called A) spatial summation. B) temporal summation. C) federal summation. D) enzymatic summation. 37) A drug that is an MAO inhibitor would A) block the action of acetylcholine. B) increase the effects of catecholamines by inhibiting their breakdown. C) reduce the effects of catecholamines by promoting their breakdown. D) block the manufacture of acetylcholine. E) block the manufacture of epinephrine 38) 39) The neurotransmitter that is not synthesized in advance and packaged into synaptic vesicles is A) acetylcholine. B) GABA. C) nitric oxide. D) dopamine. E) epinephrine.

Explanation / Answer

35. C diffusion of calcium into cell

36. D Glutamate

37. A spatial summation

38. B increase effect of CATECHOLAMINE by inhibition of their breakdown

39. C Nitric oxide

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