How a Muscle Contracts · Muscles
No ATP means the arms can grab — but never let go.
The fact that ATP is needed to let go, not to hold on, explains something famous. After death, ATP production stops, calcium leaks out and opens every grip site, and the myosin arms latch on — with nothing left to make them release. The body stiffens.
There's more: no atp means the arms can grab — but never let go. The full explanation — and the interactive version you can tap and quiz yourself on — lives in the app.
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