chapter 3 synapses
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chapter 3 synapses
Specialized junctions between neurons are called:
Sherrington found that repeated stimuli within a brief time have a cumulative effect. He referred to this phenomenon as:
Which of the following is TRUE about EPSPs?
They decay over time and space.
Depolarization is to ________ as hyperpolarization is to ________.
Which of the following would produce spatial summation?
Present two or more weak stimuli at the same time.
Temporal summation is to ________, as spatial summation is to ________.
Which of the following neurotransmitters is released by active neurons to dilate the blood vessels and increase blood flow?
The catecholamines include:
epinephrine, norepinephrine, dopamine.
What makes nitric oxide unique among neurotransmitters?
It is a gas.
If you eat a food containing tryptophan, what can you consume with it to increase its entry to the brain?
High concentrations of all neurotransmitters, except for NO, are stored in the:
The release of neurotransmitter from the presynaptic terminal is most dependent on the influx of what ion?
The neurotransmitter GABA exerts ________ effects, and its effects are almost always ________.
Second messengers" carry their messages to:
areas within the postsynaptic cell.
What is the function of the enzyme acetylcholinesterase?
It breaks acetylcholine down into components for recycling.
A drug that blocks the effects of a neurotransmitter is a(n) ________; a drug that mimics or increases the effects is a(n) ________.
The key into a lock analogy best describes:
a drug's affinity for a receptor.
Opiate drugs bind to receptors in the brain for:
LSD and other hallucinogenic drugs probably exert their effects most directly on what part of the neuron?
the postsynaptic receptors
A common drug to treat alcoholism that produces illness after consuming alcohol is: