Lecture_7 - Neuron Structure and Function Membrane potential Neurons Signal reception Signal integration Photo from Dr Michael Silvermans website

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Neuron Structure and Function Membrane potential Neurons Signal reception Signal integration Photo from Dr. Michael Silverman’s website http://www.sfu.ca/biology/faculty/silverman/index.html
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Nernst equation Equilibrium potential = Electrical gradient balances chemical gradient for a single ion. ) X]inside [ X]outside [ ln( zF RT
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Goldman equation Membrane potential = See http://www.nernstgoldman.physiology.arizona.edu/ ) ]out Cl [ ]in Na [ ]in K [ ]in Cl [ ]out Na [ ]out K [ ln( Cl Na K Cl Na K - + + - + + + + + + P P P P P P F RT
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Neurons Fig. 5.1/ 4.1 Neurons generally have polarity Signal reception Signal integration Signal conduction Signal transmission
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Neurons Dendrites are important for signal reception Signal integration occurs at axon hillock Signal conduction occurs along axon Signal transmission occurs at the axon terminal, across a synapse Fig 5.2/ 4.2
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Neurons are excitable cells Excitable = membrane potential can change quickly in response to signal Signal is sent along neuron as a change in membrane potential See also Fig 5.3/ 4.3
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Gated ion channels Gated ion channels change permeability of membrane to specific ions Fig. 3.26/ 2.49 Fig. 5.1/
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This note was uploaded on 11/05/2011 for the course BISC 305 taught by Professor Christians during the Fall '11 term at Simon Fraser.

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Lecture_7 - Neuron Structure and Function Membrane potential Neurons Signal reception Signal integration Photo from Dr Michael Silvermans website

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