What begins or triggers muscle contraction?
A)high levels of oxygen and sugar.
B)release of acetylcholine at a synapse that directly causes actin and myosin to slide.
C)release of surplus ATP by a nerve motor unit.
D)a nerve releases acetylcholine,which triggers flow of calcium,which unblocks troponin.
E)a nerve releases troponin which triggers flow of calcium which unblocks acetylcholine.

Question

Quizplus · Accepted Answer

Muscle contraction is triggered by the release of acetylcholine from a nerve, which causes calcium to flow and unblock the troponin on the actin filaments, allowing the myosin to bind to the actin and generate force.

What Begins or Triggers Muscle Contraction