What is power stroke muscle?
Understand the Problem
The question is asking for an explanation of the term 'power stroke muscle', likely referring to a specific muscle function or mechanism in a physiological context. This could relate to how muscles generate force during movement.
Answer
The power stroke in muscle is when the myosin head pulls the actin filament during contraction.
The power stroke in muscle is a phase during muscle contraction where the myosin head pulls the actin filament towards the center of the sarcomere, driven by ATP hydrolysis.
Answer for screen readers
The power stroke in muscle is a phase during muscle contraction where the myosin head pulls the actin filament towards the center of the sarcomere, driven by ATP hydrolysis.
More Information
In the power stroke, ATP binds to myosin, allowing it to release actin, hydrolyze ATP, and 'reload' for another cycle. This process is essential for muscle contraction and generates the force needed for movement.
Tips
A common mistake is misunderstanding the sequence and role of ATP in the power stroke. Ensure to follow the binding and hydrolysis steps correctly.
Sources
- ATP and Muscle Contraction | Biology for Majors II - courses.lumenlearning.com
- 6.4: Muscle Contraction - Medicine LibreTexts - med.libretexts.org
- Power stroke - Bionity - bionity.com
