7 - VertPhysNotes9/7 11/09/201012:27:00...

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Vert Phys Notes 9/7 11/09/2010 12:27:00 Action Potential Continued More muscle stretch, bigger depolarization, bigger # of action potentials Removal of extracellular Na+ ions decrease ht. of A.P o Amplitude gets less o If Na+ goes into and less out, depol cell than less to g in o Ena becomes less pos o Current and volt change at same time Current= movement Volt= result o See simultaneous and rapid change in I and V Both change with time Hard to study, need to control variable and measure the other In experiment clamped volt (Volt Clamp) o Rapidly moves Vm from rest to some depol value and holds it at that  value Allows you to measure o Take mem pot and take to another amp (comparer) If different between 2 volt, hen makes an output, continues until  same and shut off Command volt   tells it to got to certain potential 
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This note was uploaded on 12/06/2010 for the course PHYS 365R taught by Professor Pollak/zakon during the Fall '10 term at University of Texas.

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7 - VertPhysNotes9/7 11/09/201012:27:00...

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