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Question

An action potential in the nerve fibre is produced when positive and negative changes on the outside and the inside of the axon membrane are reversed because



Your Answer
A

more potassium ions enter the axon as compared to sodium ions leaving it.

Correct Answer
B

more sodium ions enter the axon as compared to potassium ions leaving it.

Your Answer
C

all potassium ions leave the axon.

Your Answer
D

all sodium ions enter the axon.


Solution

The correct option is B

more sodium ions enter the axon as compared to potassium ions leaving it.


When a nerve fibre is stimulated its membrane become more permeable to sodium ions.

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