InterviewSolution
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InterviewSolution
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At resting stage nerve cell hasA. Low `K^(+)` outside and high `Na^(+)` insideB. High `K^(+)` inside and high `Na^(+)` outsideC. High `K^(+)` inside and low `Na^(+)` outsideD. High `K^(+)` outside and low `Na^(+)` inside |
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Answer» Correct Answer - B When a neuron is not conducting any impulse, i.e. resting, the axonal membrane is comparatively more permeable to potassium ions `(K^(+))` and nearly impermeable to sodium ions (`Na^(+)`). Similarly, the membrane is impermeable to negatively charged proteins present in the axoplasm. Consequently, the axoplam inside the axon contains high concentration of `K^(+)` and negatively charged proteins and low concentration of `Na^(+)`. In contrast, the fluid outside the axon contains a low concentration of `K^(+)`, a high concentration of `Na^(+)` and thus form a concentration gradient. |
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