Resting membrane potential in nerve fibre -

Resting membrane potential in nerve fibre -

  1. Is equal to the potential of ventricular muscle fibre

  2. Can be measured by two electrodes on surface of neuron

  3. Increases as extracellular K+ increases

  4. Depends upon K+ equilibrium

View Explanation

    RMP of nerve- -70mV
  •    RMP of ventricular muscle- -90mV
    
  •    Potential difference can be measured if one electrode is on the surface and another one inside the nerve cell.
    
  •    If the concentration of K+ in ECF is increased, there is more positivity of the membrane OR Less negativity of the membrane OR Decreased magnitude of RMP.
    
  •    Resting membrane potential is reached due to the potential difference between ICF and ECF. This is majorly as result of K+ ion concentration difference in ECF and ICF.