09/15/2026
π§ β‘ How does a nerve signal make a muscle contract? πͺ
The answer lies at the Neuromuscular Junction (NMJ) β where a motor neuron communicates with a skeletal muscle fibre.
β‘ Action potential β CaΒ²βΊ influx β ACh release β ACh receptor activation β Muscle action potential β Contraction πͺ
A small junction, but a crucial step in every voluntary movement! π₯
π Save this reel for a quick Biology revision!