Question

When a neuron is not conducting any impulse the axonal membrane is comparatively
(A) More permeable to potassium ions
(B) Nearly impermeable to sodium ions
(C) Permeable to negatively charged proteins
(D) A and B are correct​

Answer 1

Answer:

There are electrical and concentration gradients in neurons that induce the sodium ions to enter the cell. The resting potential is maintained because the channels for sodium ions are closed. The membrane remains impermeable to sodium ions in the rest state. The membrane is more permeable to potassium passage. The potassium ions leak through the membrane at a greater rate than sodium enters. There is loss of positively charged ions from the inner part of the cell membrane. The inner part of the membrane carries a relatively more negative charge than the outer part of the cell membrane.

Thus, the correct answer is option A.

Answer 2

Answer:

option (d) is correct answer