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9 Cards in this Set
- Front
- Back
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G Protein
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an enzyme complex coupled to a membrane receptor
involved with second messenger |
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Adenylate Cyclase
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coverts ATP to cyclic-AMP a ring shaped form of the compound AMP
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information processing
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determines rate of the action potential generation at the initial segment in the nervous system
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excitatory postsynaptic potential (ESP)
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a graded depolarization caused by the arrival of a neurotransmitter at the postsynaptic membrane
-results from opening of chemically gated membrane channels that lead to depolarization of the plasma membrane |
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inhibitory postsynaptic potential
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graded HYPERPOLARIZATION of the postsynaptic membrane.
- results from opening of chemically gated POTASSIUM channels |
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Inhibited
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when hyperpolarization continues, the neuron is inhibited because a larger than usual depolarizing stimulus is needed to bring the membrane potential to threshold
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Summation
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individual EPSP's combine through this
it integrates the effects of all graded potentials that affect one portion of the plasma membrane |
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temporal summation
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(tempus=time)
addition of stimuli occurring in rapid succession at a single synapse that is active repeatedly |
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spatial summation
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occurs when simultaneous stimuli applied at different locations have a cumulative effect on the transmembrane potential
-involved multiple synapses that are active simultaneously |
