Neurophys - Neurophysiology The Resting Membrane Potential...

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Unformatted text preview: Neurophysiology The Resting Membrane Potential Intracellular (soma) Extracellular V V-70 mV Three Concepts 1. Concentration Gradients 2. Electrical gradients 3. Selective permeability of the membrane 100 NaCl Solid barrier in place 0 NaCl Outside Inside 100 Na+ 100 Cl- 0 Na+ 0 Cl- Solid barrier in place Outside Inside 100 Na+ 100 Cl- 0 Na+ 0 Cl- Outside Inside Barrier removed Na+ Concentration gradient = 100 Cl- Concentration gradient = 100 50 Na+ 50 Cl- 50 Na+ 50 Cl- Outside Inside Barrier removed Na+ Concentration gradient = 0 Cl- Concentration gradient = 0 50 Na+ 50 Cl- 50 Na+ 50 Cl- Outside Inside Measure voltage difference Na+ Concentration gradient = 0 Cl- Concentration gradient = 0 System at equilibrium 100 Na+ 100 Cl- 0 Na+ 0 Cl- Solid barrier in place Outside Inside 100 Na+ 100 Cl- 0 Na+ 0 Cl- Replace with Na+ permeable membrane Outside Inside Na+ Concentration gradient = 100 50 Na+ 100 Cl- 50 Na+ 0 Cl- Replace with Na+ permeable membrane +100-50 +50 Outside Inside Na+ Concentration gradient = 0 50 Na+...
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This note was uploaded on 12/01/2011 for the course PSB 6087 taught by Professor Stehouwer during the Fall '08 term at University of Florida.

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Neurophys - Neurophysiology The Resting Membrane Potential...

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