The Sliding filament theory

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What inside the muscle fibre?
numerous myofibrils
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What are they called?
sacromeres
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What two type of proteins made of?
actin and thicker myosin
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What two other protein molecules is actin associated with?
tropomysin and tropnin
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What brings about the movement of actin?
the change in orientation of the myosin heads
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What does the myosin head attach to?
the actin
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What dips forward?
the myosin head
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What starts the sliding filament theory?
myosin binding sites are blocked bytropomyosin,
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What can't bind?
myosin head
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What ion binds to troponin?
Calcium ions
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What does this cause to move?
troponin and tropomyosin
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What does this expose?
myosin binding sites
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What is released?
AdP and Pi released
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What binds?
ATP
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What does Atpase cause?
ATP hydrolysis
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What position does the myosin head return to?
an upright position
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Card 2

Front

What are they called?

Back

sacromeres

Card 3

Front

What two type of proteins made of?

Back

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Card 4

Front

What two other protein molecules is actin associated with?

Back

Preview of the front of card 4

Card 5

Front

What brings about the movement of actin?

Back

Preview of the front of card 5
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