Lecture 2 - Eric Wei Cogs Sci 1 9/29/2009 Neuronal...

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Eric Wei Cogs Sci 1 9/29/2009 Neuronal Communication Mary ET Boyle 1.) Communication within a neuron a. Electrical potentials of Axons b. The Membrane Potential c. He Action potential d. Conduction 2.) Slide 6 a. Simplifying to understand i. Stick electrode in the axon to “tap” into the axon so you can observe activity. ii. Voltmeter 3.) Slide 4 a. Sodium is almost 10 times more outside b. Potassium is 20 times more inside c. Cl is 10 times higher outside i. These differences accounts for “Resting Membrane potential 1. These differences make it important to have asharp electrode b/c breaking the cell membrane will hurt its integrity 4.) Slide 6 a. Resting potential is at -70 mV b. Stimulating neuron results in 1 c. The greater the current of stimulus of the axon, the greater the differences in amplitude d. *Finally, at a certain point of current increase, the Action potential manifests. This current is “Threshold of excitation”. i.
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This note was uploaded on 01/10/2012 for the course COGS cogs 1 taught by Professor Nitz during the Fall '09 term at UCSD.

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Lecture 2 - Eric Wei Cogs Sci 1 9/29/2009 Neuronal...

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