Sliding Filament Theory and Contraction Cycle
Anatomy and Physiology · Flashcards
ANATOMY AND PHYSIOLOGY · FLASHCARDS
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QUESTION
Why does rigor mortis occur after death?
QUESTION
What causes a myosin head to detach from actin?
QUESTION
What ends contraction once stimulation stops?
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ANSWER
Ca2+-ATPase pumps (SERCA) return Ca2+ to the sarcoplasmic reticulum, and tropomyosin again blocks actin's binding sites.
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