When a nerve cell is stimulated,there is a sudden,momentary inflow of positively charged sodium ions across the cell's membrane,followed by an outflow of positively charged potassium ions.

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Quizplus · Accepted Answer

This is known as action potential and happens due to the opening and closing of voltage-gated ion channels present in the neuron's cell membrane. The influx of sodium ions makes the inside of the cell more positive than the outside, creating a temporary depolarization. This triggers the activation of potassium channels, leading to an outflow of positively charged ions and repolarization of the cell membrane.

When a Nerve Cell Is Stimulated,there Is a Sudden,momentary Inflow