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Biology > 7 - SLIDING FILAMENT THEORY > Flashcards

7 - SLIDING FILAMENT THEORY Flashcards

1
Q

1ST STEP

A

Ca2+ released from the sarcoplasmic reticulum of the myofibril

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2
Q

2nd STEP

A

Ca2+ binds to troponin on actin, causing the actin-myosin blocking protein tropomyosin to move

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3
Q

3rd STEP

A

Myosin heads can now bind to actin, forming a cross bridge

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4
Q

4th STEP

A

Myosin heads nod forward, thus pulling the actin over the myosin

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5
Q

5th STEP

A

Hydrolysis of ATP by ATPase on the myosin head supplies energy to enable the breaking of the actin myosin cross bridges and formation of new ones further away

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Biology (33 decks)

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