Sliding filament theory

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•
Biology
•
10th - 12th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
What is the sliding filament theory?
Back
The sliding filament theory explains how muscles contract by the sliding of actin filaments over myosin filaments, resulting in muscle shortening.
2.
FLASHCARD QUESTION
Front
What is the role of Ca2+ in muscle contraction?
Back
Ca2+ binds to troponin, causing a conformational change that allows myosin to bind to actin, initiating contraction.
3.
FLASHCARD QUESTION
Front
What is the all-or-none response in muscle fibers?
Back
The all-or-none response means that when a muscle fiber is stimulated, it contracts completely or not at all.
4.
FLASHCARD QUESTION
Front
Where is Ca2+ stored in muscle cells?
Back
Ca2+ is stored in the sarcoplasmic reticulum.
5.
FLASHCARD QUESTION
Front
What is needed for muscle contraction to continue?
Back
Ca2+ and ATP are needed for muscle contraction to continue.
6.
FLASHCARD QUESTION
Front
What causes the force of muscle contraction?
Back
The force of contraction is caused by the movement of actin filaments.
7.
FLASHCARD QUESTION
Front
What happens to ATP during muscle contraction?
Back
ATP binds to myosin, allowing it to detach from actin after a power stroke.
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