When a nerve fibre is stimulated, the inside of the membrane becomes

Filled with acetyl choline

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Negatively charged

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Positively charged

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Neutral

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Solution

The correct option is C Positively charged
The membranes of all nerve cells have a potential difference across them, with the cell interior negative with respect to the exterior. In neurons, stimuli can alter this potential difference by opening sodium channels in the membrane. So, sodium ions flow into the cell, reducing the voltage across the membrane.

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