When calcium ion binds to troponin, myosin shortens. tropomyosin moves into the groove between the helical actin strands. muscle relaxation occurs. active sites on the myosin are exposed. actin heads will bind to myosin.

When calcium ion binds to troponin,
myosin shortens.
tropomyosin moves into the groove between the helical actin strands.
muscle relaxation occurs.
active sites on the myosin are exposed.
actin heads will bind to myosin.
 
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The post When calcium ion binds to troponin, myosin shortens. tropomyosin moves into the groove between the helical actin strands. muscle relaxation occurs. active sites on the myosin are exposed. actin heads will bind to myosin. appeared first on Superb Professors.

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