Week%203%20-%20Student%20Edition

Week%203%20-%20Student%20Edition - B IPN 100 Dr. Fortes...

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BIPN 100 Chris Childers Dr. Fortes Winter 09 Lecture 4 – January 12 th Lecture 5 – January 14 th Lecture 6 - January 16 th Graded Potentials Action Potentials Action Potential Mechanism Refractory Periods Action potential conduction Myelin & Saltatory conduction Glial Cells Synapses EPSPs / IPSPs Receptors Vessicle Packaging Action Potentials vs. Graded Potentials Graded Potential Action Potential Ligand? (Electrical, chemical etc.) Propogation? Hyperpolarizing? Depolarizing? Refractory Period? Summation? Threshold? How is a stronger signal conveyed? Diagram an action potential on the following graph… Na+, K+ and Cl- channels have two different kinds of gates. What are they? And how do they factor into the shape of the action potential we just drew? How do they effect the refractory period of action potentials?
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BIPN 100 Chris Childers Dr. Fortes Winter 09 Why does the action potential only reach +30mV when we know that the equilibrium potential of Na+ ions is significantly higher? The action potential is a good example of both a positive feedback loop and a negative
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Week%203%20-%20Student%20Edition - B IPN 100 Dr. Fortes...

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