biology·NCERT Class 11·Neural Control & Coordination
Neuron & Synapse
Medium+90 XP⚡
A nerve impulse travels at up to 120 m/s along a myelinated axon — that's 430 km/h! Fire an action potential in 3D and watch Na⁺ ions flood in, then K⁺ flood out.
›Resting potential: −70 mV (inside negative); K⁺ outside, Na⁺ inside.
›Action potential: depolarisation (Na⁺ in) → peak +35 mV → repolarisation (K⁺ out).