NEETZoologyNeural Control and Coordination
What is the state of the neural membrane when a neuron is not conducting any impulse?
Options
- APolarised
- BDepolarised
- CHyperpolarised
- DHypopolarised
Correct answer
A. Polarised
Step-by-step solution
The electrical potential difference across the resting plasma membrane is called the resting potential.The outer surface of the axonal membrane possesses a positive charge while its inner surface becomes negatively charged and therefore is polarised. The membrane of a neuron is polarised due to the presence of different types of ion channels and the ionic gradients maintained by the sodium-potassium pump . The fluid outside the axon in a resting state contains a low concentration of K⁺, a high concentration of Na⁺