BIO 203 Week 3 notes
BIO 203 Week 3 notes BIO 203LEC
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This 1 page Class Notes was uploaded by Andrea Tufekcic on Monday September 19, 2016. The Class Notes belongs to BIO 203LEC at University at Buffalo taught by Loretz, C A in Fall 2016. Since its upload, it has received 24 views. For similar materials see General Physiology Lec in Biology at University at Buffalo.
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Date Created: 09/19/16
Action Potential Hodgin-Huxley model: programmed cycle of ionic conductions charges -voltage dependent regulation of ionic conductance Triggering Event Repolarization Influx of sodium Opening of some voltage gated Na channels -Voltage gated channels: activation and inactivation gates -Voltage gated potassium channel: opens at depolarization, repolarizes the cell so it can continue creating action potentials -Sodium potassium ATPase actively maintaining gradients in the background in the long run = not needed for action potentials Absolute refractory period: period during and immediately after action potential where another action potential can’t be initiated= sodium inactivation gate closes Relative refractory period: period after the action potential where larger stimuli is needed for another to be created = result of potassium movement
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