Assertion : When a neuron is not conducting any impulse, i.e. resting, the axoplasm inside the axon contains high concentration of `K^(+)` and negatively charged proteins and low concentration of `Na^(+)`.
Reason : In resting, the axonal membrane is comparatively more permeable to `K^(+)` ions and nearly impermeable to `Na^(+)` ions. Similarly, the membrane is impermeable to negatively charged proteins present in axoplasm

Options

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If both assertion and reason are false.

Answer

A

Explanation

When a neuron is not conducting any impulse, i.e resting, the axoplasm inside the axon contains high concentration of `K^(+)` and negatively charged proteins and low concentration of `Na^(+)`.
In resting, the axonal membrane is comparatively more permeable to `K^(+)` ions and nearly impermeable to `Na^(+)` ions. Similarly, the membrane is impermeable to negatively charged proteins present in axoplasm.