After death the same molecule is lost entirely and the cross-bridges cannot release. The stiffening that follows is:
ARitual fixation
BRigor mortis
CRigor thermus
DRictus muscularis
Answer & Solution
Correct answer: B. Rigor mortis
1. Detachment of myosin from actin needs energy.
2. With none left, the heads stay locked on.
3. The result is rigor mortis.
_Source: OpenStax Anatomy and Physiology 2e, Chapter 10, Muscle Tissue._
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