What does “Nerve impulse” actually mean in Neural Control and Coordination, and why does it matter for NEET?
at rest the membrane is polarised with more sodium outside; a stimulus lets sodium rush in (depolarisation), generating the impulse.
In simple words: at rest the membrane is polarised with more sodium outside; a stimulus lets sodium rush in (depolarisation), generating the impulse. Getting Nerve impulse clear matters because NEET questions on Neural Control and Coordination usually test this idea directly, not just a formula you memorised.
Key point
Nerve impulse
Common mistake
thinking sodium is more concentrated inside the neuron at rest.
Memory tip
rest = Na+ out and K+ in; the impulse is Na+ flooding inward.
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