Resting Membrane Potential

RMP is the potential difference between the inside of a cell and outside.RMP is maintained by K+ ion.

  1. RMP of neuron   -70mV
  2. RMP of smooth muscle -50mV
  3. RMP of cardiac muscle  -90mV
  4. RMP of skeletal muscle  -90mV

Changes in Na+ ion concentration affects action potential but not RMP.

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