Neurochemistry MCQ
Bidirectional, instantaneous synaptic transmission is typical of __________.
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Correct Answer:
Electrical synapses
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Vesicles are located ____.
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Correct Answer:
In presynaptic terminals
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A drug that inhibits the action of the enzyme acetylcholinesterase will have the effect of ____.
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Correct Answer:
Prolonging the action of acetylcholine at its synapses
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Autoreceptors monitor the ____.
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Correct Answer:
Amount of neurotransmitter released
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________ open or close in response to binding specific molecules.
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Correct Answer:
Chemically gated channels
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"transporter" proteins transport neurotransmitters ____.
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Correct Answer:
Back into the presynaptic neuron
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For cells that communicate by electrical synapses, the message travels between cells via ________.
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Correct Answer:
Gap junctions
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"drugs that block mao-b are ________ agonists, whereas mao-a blockers are ________.
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Correct Answer:
Norepinephrine; dopamine agonists
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The effect of a neurotransmitter on a postsynaptic neuron is determined by the ____.
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Correct Answer:
Receptors on the postsynaptic membrane
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A metabotropic synapse, by way of its second messenger, ____.
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Correct Answer:
Can influence activity in much or all of the postsynaptic cell
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Releasing hormones are synthesized in the ____ and released in the ____.
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Correct Answer:
Hypothalamus; anterior pituitary
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Ionotropic effects ____.
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Correct Answer:
may depolarize or hyperpolarize the postsynaptic membrane
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Exocytosis is the process by which neurotransmitters are ____.
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Correct Answer:
Released from the presynaptic neuron
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Depolarization is to ____ as hyperpolarization is to ____
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Correct Answer:
Excitation; inhibition
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Damage to the ________ dopaminergic system would be expected to impair movement.
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Correct Answer:
Nigrostriatal
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Cholinergic neurons are thought to ________ within the ________.
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Correct Answer:
Dorsolateral pons; elicit most of the aspects of REM sleep
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All of the following are neurotransmitters except ________.
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Correct Answer:
Serotonin (5-HT).
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A(n) ________ is a drug that blocks or inhibits postsynaptic receptor effects.
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Correct Answer:
Antagonist
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