Week 3 - Student Edition0

Week 3 - Student Edition0 - BIPN 100 Dr. Fortes Lecture 5 -...

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BIPN 100 Chris Childers Dr. Fortes Winter 2010 Lecture 5 - January 4 th Lecture 6 – January 6 th Lecture 7 – January 8 th Graded potentials Action Potentials Hodgkin & Huxley Voltage Clamp Action Potentials Voltage Gated Channels Gating Mechanism Action Potential Mechanism Refractory Periods Conduction of Action Potentials Speed of conduction – diameter, membrane permeability Saltatory Conduction Myelin Graded Potential Action Potential Ligand? (Electrical, chemical etc.) Propagation? Hyperpolarizing? Depolarizing? Refractory Period? Summation? Threshold? How is a stronger signal conveyed? Action Potential Diagram an action potential on the following graph… and answer the adjacent questions… 1. Why does the action potential only reach +30mV when we know that the equilibrium potential of Na+ ions is significantly higher? 2. The action potential is a good example of both a positive feedback loop and a negative feedback loop. Explain. 3.
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Week 3 - Student Edition0 - BIPN 100 Dr. Fortes Lecture 5 -...

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