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18 Cards in this Set
- Front
- Back
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Suppose that the electrochemical force for an anion X (X-) acts to move the anion out of the cell. If a Neurotransmitter binding to it's receptor opened channels for X- on the postsynaptic cell, then the response would? |
Be an EPSP |
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Suppose that the calcium could be removed from the extracellular fluid surrounding a neuron. Such removal would inhibit the ability of a neuron to? |
Release neurotransmitter |
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Synaptic vesicles |
release neurotransmitters by exocytosis |
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If sodium channels closed in response to a stimulus, then? |
The neuron would be hyperpolarized |
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Which of the following neurotransmitters is a biogenic amine but not a catecholamine? |
Serotonin |
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Which of the following is most likely to occur at an axoaxoinc synapse? |
Presynaptic modulation |
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What happens to the concentration of neurotransmitter in the synamptic cleft when the frequency of action potentials increase in the presynaptic neuron? |
it increases |
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The EPSP's from two different synapses occur at the same time and cause a larger depolarization the either one alone can cause. This is an example of? |
Spatial summation |
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At electrical synapses, which type of junction exists between the two cells? |
Gap Junction |
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True or False When the opening of the ion channels allows both sodium and potassium ions to move through, no change in membrane potential occurs because sodium moves into the cell and potassium moves out of the cell. |
False |
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Neurotransmitter receptors are found at? |
Chemical synapses |
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True or False Whether a synapse is excitatory or inhibitory is determined by the mechanism of coupling between the neurotransmitter receptor and ion channels in the postsynaptic cells. |
True |
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True or False The synaptic delay includes the time it takes for an action potential to travel from the trigger zone of a presynaptic cell to the axon terminal. |
False |
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True or False A given neurotransmitter might be excitatory at one synapse and inhibitory at another synapse. |
True |
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Given that release of an inhibitory neurotransmitter is altered by presynaptic facilitation, the response in the postsynaptic cell will be a __________ degree of hyperpolarization. |
Larger |
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The response to a neurotransmitter is faster at ________________ receptors. |
Ionotrophic |
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Adenylate cyclace catalyzes the formation of _______________. |
cAMP |
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# 22 Essay question |
#22 |
