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Section 2 Bipn%2 - Section#2 Quick recap from last section Two factors create driving forces for ions 1 Concentration gradient 2 Electric

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1/18/10 Section #2 Quick recap from last section: Two factors create driving forces for ions: 1. Concentration gradient 2. Electric potential (Electrical gradient) Eion (equilibrium potential) described through the Nerst Equation gives the voltage difference necessary to counterbalance the concentration gradient for a specific ion Resting membrane potential - Two factors influence a cells membrane potential: 1. 2. Goldman Equation – used to calculate resting membrane potential Depolarize – the cell membrane potential becomes less negative Repolarize – the cell membrane moves back toward resting membrane potential Hyperpolarization – the cell membrane becomes more negative Hypothetical Cell: When channels for Na+, Ca2+, Cl- and K+ open will they hyperpolarize or depolarize the cell? Can closing K+ channel cause a cell to depolarize?
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What happens to the concentration gradient for these ions? What are ways cells can change the permeability to an ion?
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This note was uploaded on 01/20/2010 for the course ECON 100 taught by Professor Hnewhous during the Spring '08 term at UCSD.

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Section 2 Bipn%2 - Section#2 Quick recap from last section Two factors create driving forces for ions 1 Concentration gradient 2 Electric

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