what factors determine the resting membrane poteintal ?? whats the importence of one of these factors...

what factors determine the resting membrane poteintal ?? whats the importence of one of these factors for cell function?

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ANSWER :-

Different types of ion channels are present on the neural membrane. These ion channels are selectively permeable to different ions. When a neuron is not conducting any impulse, i.e., resting, the axonal membrane is comparatively more permeable to potassium ions (K+) and nearly impermeable to sodium ions (Na+). Similarly, the membrane is impermeable to negatively charged proteins present in the axoplasm.Consequently, the axoplasm inside the axon contains high concentration of K+ and negatively charged proteins and low concentration of Na+. In contrast, the fluid outside the axon contains a low concentration of K+, ahigh concentration of Na+ and thus form a concentration gradient. These ionic gradients across the resting membrane are maintained by the active transport of ions by the sodium-potassium pump which transports 3Na+ outwards for 2 K+ into the cell. As a result, the outer surface of theaxonal membrane possesses a positive charge while its inner surface Structure of a neuron becomes negatively charged and therefore is polarised. The electricalpotential difference across the resting plasma membrane is called as the Resting membrane Potential.

gladiator answered 2 years ago

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