Resting membrane potential in nerve fibre -
- Is equal to the potential of ventricular muscle fibre
- Can be measured by two electrodes on surface of neuron
- Increases as extracellular K+ increases
- Depends upon K+ equilibrium
answer 4
Explaination
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.