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Contraction begins when myosin pulls on which protein?

AAlanine
BActin
CAcetone
DAlbumin
Answer & Solution
Correct answer: B. Actin
1. Two filament proteins slide past each other. 2. Myosin is the puller. 3. The one pulled is actin. _Source: OpenStax Anatomy and Physiology 2e, Chapter 10, Muscle Tissue._
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