Question

Hello !
It is said that concentration of K+ ions is 30 times greater inside neuron membrane and that of Na+ ions is 10 times greater out side .
But neuron membrane is negative inside then if K+ ions arebgreater inside it means more positive inside .
Isn't that wrong

Answer 1

Typically, the amount of certain potassium channels is most important for control of the resting potential (see below). Some ion pumps such as the Na+/K+-ATPase are electrogenic, that is, they produce charge imbalance across the cell membrane and can also contribute directly to the membrane potential.

In most neurons, \text{K}^+K+K, start superscript, plus, end superscript and organic anions (such as those found in proteins and amino acids) are present at higher concentrations inside the cell than outside. In contrast, \text{Na}^+Na+N, a, start superscript, plus, end superscript and \text{Cl}^-Cl−C, l, start superscript, minus, end superscript are usually present at higher concentrations outside the cell. This means there are stable concentration gradients across the membrane for all of the most abundant ion types.

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