Potential difference across resting membrane is negatively charged. This is due to differential distribution of the following ions.

Options

A. `Na^(+) ` and `k^(+)` ions
B. `CO_(3)^(2-)` and `Cl^(-)` ions
C. `Ca^(+4)` and `Cl^(-)` ions
D. `Ca^(+4)` and `Cl^(-)` ions

Explanation

The ion gated channels on. The neurolemma control the movement of `Na^(+)` and `K^(+)` ions on both inner and outer side of nerve cell.
`Ca^(+), CO_(3)^(2-), Mg^(2+) and Ca^(4+)` ions ·are not related with nerve excitation rather are involved in other biological functions `Ca^(+2)` ions are related to muscle metabolism where `Mg^(2+)` ions act as a cofactor in some reactions.
`Cl^(-)` ion channels are important for setting cell resting membrane potential, transepithelial salt transport, and the acidification of internal and extracellular compartments