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8 Cards in this Set
- Front
- Back
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resting potential of a cell:
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approx -70mV
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Nernst Equation
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E=RT/z F ln (I)o/(I)i
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Resting membrane potential in a cell
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typically -40 to -90 mV
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threshold potential
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potential at which an action potential is initiated
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ion transporters
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move ions against their concentration gradients, therefore create ion concent. gradients.
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ion channels
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proteins that allow only certain kinds of ions across the (diffuse down gradient)
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Nernst Equation
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E=58/z log (Io/Ii)
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Hodgkin and Katz hypothesis
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if axon resting potential is predominantly due to K+ perm then changing the outside K+ concentration should change the resting potential as predicted by Nernst Eqtn
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