FVH Pathologie Practice Questions - Fachtierarzt FVH Für Pathologie (Switzerland) Exam

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Which biochemical process is directly responsible for the onset and subsequent resolution of rigor mortis in mammalian carcasses following death?

Accumulation of intracellular calcium causing persistent troponin activation without ATP depletion, followed by autolytic myofibril synthesis Exhaustion of intracellular ATP preventing actin-myosin cross-bridge dissociation, followed by resolution via enzymatic autolysis of myofibrillar proteins Excessive lactic acid neutralization preventing actin contraction, followed by putrefactive bacterial invasion Rapid post-mortem dephosphorylation of myosin light chains leading to permanent cross-linking until putrefaction occurs

Correct Answer:

Exhaustion of intracellular ATP preventing actin-myosin cross-bridge dissociation, followed by resolution via enzymatic autolysis of myofibrillar proteins

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