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12 Cards in this Set
- Front
- Back
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What structures in the cell membrane function as ion channels?
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Integral proteins
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What three characteristics of ions are important for selectivity?
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1) Charge
2) Size 3) How much water the ion can attract and hold |
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Channels can be classified as either gated or nongated channels. A Na+ channel that is always open would be classified as a/an ___ channel.
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Nongated
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Would Na+ ions move into or out of the neuron through these cannels?
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Into
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What are the characteristics of voltage-gated Na+ channels?
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1) Found along the axon
2) Important for action potential 3) Opened and closed by gates |
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Voltage-gated K+ channels open at what voltage?
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130mV
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Where are nongated channels located on the neuron?
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Cell bodies, dendrites, axons
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Where are chemically-gated channels located on the neuron?
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Cell bodies, dendrites
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Where are voltage-gated channels located on the neuron?
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Axon Hillock, Nodes of Ranvier
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What potential type is dependent on nongated ion channels?
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Resting
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What potential type is dependent on chemically-gated ion channels?
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Synaptic
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What potential type is dependent on voltage-gated ion channels?
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Action
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