Questions and Answers
What occurs during Cross Bridge Formation?
What happens during The Power Stroke?
ADP is released and the activated myosin head pivots sliding the thin myofilament towards the center of the sarcomere.
What is Cross Bridge Detachment?
It is when another ATP binds to the myosin head, weakening the link between myosin and actin, leading to detachment.
What occurs during Reactivation of the Myosin Head?
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Study Notes
Cross Bridge Cycle Steps
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Cross Bridge Formation: Myosin head, when activated, binds to actin to form a cross bridge. This process releases inorganic phosphate, strengthening the bond between myosin and actin.
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The Power Stroke: The release of ADP occurs, causing the activated myosin head to pivot. This action slides the thin myofilament toward the sarcomere's center, generating muscle contraction.
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Cross Bridge Detachment: The binding of a new ATP molecule to the myosin head causes the connection between myosin and actin to weaken, allowing for detachment.
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Reactivation of Myosin Head: ATP undergoes hydrolysis to produce ADP and inorganic phosphate, providing energy that returns the myosin head to its cocked position, ready for another cycle.
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Description
This quiz focuses on the key steps of the Cross Bridge Cycle involved in muscle contraction. Each card highlights essential terms and their definitions, aiding in understanding the mechanics of muscle movement. Perfect for students studying physiology or related fields.
