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Neural Control and Coordination

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  1. In the resting state of the neural membrane, diffusion due to concentration gradients, if allowed, would drive
    1. K+ into the cell
    2. K+ and Na+ out of the cell
    3. Na+ into the cell
    4. Na+ out of the cell
Correct Option: C

In a resting state of the neural membrane, Na+ concentration is higher on the outer side and K+ concentration is more within the cell. This concentration gradient is maintained by voltage gated channels. Hence if diffusion is allowed Na+ would enter the cell and K+ would leave.


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