NEET BiologyClass 11Nerve impulseMediumStatement based

Consider the changes in a nerve fibre when a stimulus is applied.

Statement I: When a stimulus is applied, the membrane becomes freely permeable to Na⁺, so Na⁺ rushes in and the polarity of the membrane is reversed.
Statement II: Resting potential is restored by the rapid inflow of K⁺ ions into the axon.

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Consider the changes in a nerve fibre when a stimulus is applied.

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