NEETZoology-Nervous System
NEET Zoology Neuronal Function MCQ Question
Type: MCQ-conceptual-Medium
Electrogenic Na⁺-K⁺ ATPase transmembrane pumps in the axonal membrane transport (1) 3 Na⁺ outwards for 2K⁺ into axoplasm (2) 2 Na⁺ inwards for 3K⁺ to ECF (3) 3 Na⁺ to axoplasm for 2K⁺ outwards (4) 1 Na⁺ to axoplasm for 2K⁺ outwards
A
3 Na⁺ outwards for 2K⁺ into axoplasm
B
2 Na⁺ inwards for 3K⁺ to ECF
C
3 Na⁺ to axoplasm for 2K⁺ outwards
D
1 Na⁺ to axoplasm for 2K⁺ outwards
Correct Answer
Option A
Detailed Explanation
The Na⁺-K⁺ ATPase pump moves 3 Na⁺ ions out of the cell and 2 K⁺ ions into the cell, maintaining the electrochemical gradient.
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