NEET2011ZoologyNeural Control and CoordinationActual
When a neuron is an resting state, i e , not conducting any impulse, the axonal membrane is
Options
- Aequally permeable to both Na ⁺ and K ⁺ ions
- Bimpermeable to both Na ⁺ and K ⁺ ions
- Ccomparatively more permeable to K ⁺ ions and nearly impermeable to Na ⁺ ions
- Dcomparatively more permeable to Na ⁺ ions and nearly impermeable to K ⁺ ions
Correct answer
C. comparatively more permeable to K ⁺ ions and nearly impermeable to Na ⁺ ions
Step-by-step solution
Neurons are excitable cells because their membrane are in a polarised state. Different types of selectively permeable channels are present on the neural membrane. When a neuron is not conducting any impulse, ie, resting, the axonal membrane is comparatively more permeable to potassium ion ( K ⁺ ) and nearly impermeable to sodium ion ( Na ⁺ ) .