What substance causes the actin to change shape?
Understand the Problem
The question is asking which specific substance is responsible for causing actin, a protein that plays a crucial role in muscle contraction and cell movement, to change its shape. This pertains to biochemistry and cell biology.
Answer
calcium
The final answer is calcium.
Answer for screen readers
The final answer is calcium.
More Information
Calcium ions play a crucial role in muscle contraction by binding to troponin, which causes a conformational change that moves tropomyosin away from actin's binding sites, allowing myosin to form cross-bridges with actin.
Sources
- Sliding Filament Theory Coloring - The Biology Corner - biologycorner.com
- The motor unit consists of muscle fibers and aWhat - Chegg - chegg.com
- SlideFilament Day 4.pdf - Course Hero - coursehero.com
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