BIPN140 Lecture 3

BIPN140 Lecture 3 - Cellular Neurobiology BIPN140

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http://www.biology.ucsd.edu/classes/bipn140.FA10/ Cellular Neurobiology BIPN140 Lecture outlines, slides and papers and 1st problem set are all on the website
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Figure 3.10 Passive current flow in an axon
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Membrane capacitance Membrane resistance C m = 1 µF/cm 2 = specific membrane capacitance c m = capacitance/unit length = C m 2 π a = µF/cm a = radius of axon R m = 100s-1000s cm 2 = specific membrane resistance r m = resistance/unit length = R m /2 π a = cm a = radius of axon Components of passive membrane
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Box 3C(2) Passive Membrane Properties τ = R m C m = r m c m units are time - sec or msec
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Box 3C(1) Passive Membrane Properties λ = r m /r i units are distance - µm or mm R i = cm = specific internal resistance i a = radius of axon m
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Figure 3.12 Action potential conduction requires both active and passive current flow
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Figure 3.13 Saltatory action potential conduction along a myelinated axon
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Figure 3.14 Speed of action potential conduction in unmyelinated versus myelinated axons
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This note was uploaded on 10/30/2010 for the course BIPN BIPN 140 taught by Professor Spitzer during the Fall '07 term at UCSD.

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BIPN140 Lecture 3 - Cellular Neurobiology BIPN140

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