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Home Q & A Board Biology-Related Homework Help General Biology
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maranah maranah
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7 years ago
How are active transportation and facility diffusion interdependent during the propagation of a nerve impulse?
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Educator
7 years ago
Hi maranah

The sodium-potassium pump uses active co-transport to move 3 sodium ions OUT of the axon and 2 potassium ions INTO the axon, creating a net positive outer charge and a negative inner charge.

A nerve impulse, caused by a stimulus, causes sodium ions to rush back into the cell, causing a spike in positive charge outside the cell.

An impulse moves down the axon, potassium channels allow potassium ions to flow back out of the axon and return to resting potential state of positive outside and negative inside.
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