malloryjackson8416 malloryjackson8416
  • 17-01-2024
  • Biology
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Contraction of myofibrils within a muscle fiber begins when:_______
Sodium enters the muscle fiber
Acetylcholine binds to ligand gates
Calcium is released from the sarcoplasmic reticulum
An action potential travels t-tubules
Calcium is moved into the sarcoplasmic reticulum

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