Home
Class 11
BIOLOGY
When a neuron is in resting state i.e. n...

When a neuron is in resting state i.e. not conducting any impulse, the axonal membrane is

A

Comparatively more permeable to K+ ions and nearly impermeable to Na+ ions

B

Comparatively more permeable to Na+ ions and nearly impermeable to K+ ions

C

Equally permeable to both `Na^+` and `K^+` ions

D

Impermeable to both `Na^+ and K^+` ions

Text Solution

Verified by Experts

The correct Answer is:
A
During resting membrane potential the permeability of `K^(+)` is more than `Na^(+)" as a result " K^(+)` move out and thus maintain resting membrane potential i.e. outside the membrane more positive charge than negative.
Promotional Banner

Similar Questions

Explore conceptually related problems

When a neuron is in resting state i.e. not conducting any impluses, the axonal membrane is

When a neuron is not conducting any impulse i.e. resting , the axonal membrance is

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

Read the given statements and select the correct ones. (i)Autonomic neural system transmits impulses from the CNS to the voluntary organs and striated muscles of the body. (ii)Unmyelinated nerve fibres do not have Schwann cells which form the myelin sheath. (iii)Axonal membrane of a neuron while not conducting any impulse is comparatively more permeable to potassium ions (K^+) than to sodium ions (Na^+) (iv)A synapse is formed by the membranes of presynaptic neuron and a post synaptic neuron.

An action potential in the nerve fibre is produced when positive and negative charges on the outside and the inside of the axon membrane are reversed, because