The resting potential is established by the Na+/K+ ATPase pumping ions against their gradients, and the membrane's higher permeability to K+ allows K+ to diffuse out, creating an equilibrium potential of -65mV.
- Na+ K+ ATPase actively transports 3 Na+ out and 2K+ in - membrane is more permeable to K+ and less permeable to Na+ - some K+ ions diffuse out through leakage K+ channels - diffusion slows as K+ ions repelled by positive charge outside axon - chemical and electrical gradients balanced - equilibrium established - no net movement of ions - 65mV
| Front | How is the resting potential established? |
|---|---|
| Back | - Na+ K+ ATPase actively transports 3 Na+ out and 2K+ in - membrane is more permeable to K+ and less permeable to Na+ - some K+ ions diffuse out through leakage K+ channels - diffusion slows as K+ ions repelled by positive charge outside axon - chemical and electrical gradients balanced - equilibrium established - no net movement of ions - 65mV |
Tags: nerves
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