Question : What is resting membrane potential? Give the role of sodium potassium pumps in maintaining it. How does resting potential change into action potential?

Question : What is resting membrane potential? Give the role of sodium

1.	Question : What is resting membrane potential? Give the role of sodium potassium pumps in maintaining it. How does resting potential change into action potential?
Answer» Solution :Resting potential : It is the voltage (charge) difference across the CELL membrane when the cell is at rest. Resting membrane potential (RMP) is a product of the DISTRIBUTION of charged particles A xoplasm INSIDE the axon contain high conc. of `K^+` and low conc. of `Na^(+)`.The outside the axon contain low conc. of` K^+` and high conc. of `Na^+`.As a RESULT outer surface, ofaxonal membrane is positively charged and in inner surface is negatively charged. The electric positively difference across the resting plasma membrane is called resting potential. When a nerve FIBRE is stimulated the permeability of membrane to `Na^(+)` increased at a point of stimulus and polarity of membrane reversed due to influx of`Na^(+)`. The electic potential difference across the plasma membrane at that site is called as action potential.