NEETZoologyNeural Control and Coordination
What is the fluid outside the axon in a resting state composed of?
Options
- ALow concentration of K⁺ and high concentration of Na⁺
- BHigh concentration of K⁺ and low concentration of Na⁺
- CLow concentration of both K⁺ and Na⁺
- DHigh concentration of both K⁺ and Na⁺
Correct answer
A. Low concentration of K⁺ and high concentration of Na⁺
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 fluid outside the axon in a resting state contains a low concentration of K⁺, a high concentration of Na⁺ and thus form a concentration gradient. Different types of ion channels are present on the neural membrane, which are selectively permeable to different ions. T