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Cards In This Set
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What type of system is the nervous system?
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An electrical system
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How does the Sodium Potassium Pump Work?? Why is it important for the resting membrane potential?
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The pump works by using an ATP to pump 3 na out and 2 k in. It is important for the resting membrane potential because it builds up a concentration gradient
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Channel Proteins
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These are proteins that span the membrane and let in certain ions. It specific for certain ions.
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What is diffusion powered by?
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From high to low..random thermal motion powers diffusion
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What does the movement of an ion thru a channel depend upon?
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Concentration gradient and electrical difference
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What is the membrane potential of neuron?
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-65mV
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What is the equlibrium potential?
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An ion will be going down in concentration gradient until it is opposed by an electrical gradient.
It is the electrical potential difference that matches the ionic concentration gradient. |
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What is the equilibrium potential for Potassium?
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It would be -80mV. This is the charge that would stop K from flowing down its concentration gradient. This is also the potential if potassium were the only permeable ion leaving behind this membrane potential.
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What is the equlibrium potential for Sodium?
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It would a 62mV
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What is the equlibirm potential for Cholride ions?
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-65 MV..same as neuron
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What is the ionic driving force?
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Ions will move according to this force. It is the difference between membrane potential and equilbrium potential. The bigger the difference the more incentive for ions to move
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