All are true regarding muscular changes after death except –
**Core Concept**
Muscular changes after death are a result of the cessation of cellular metabolic processes, leading to autolysis and the breakdown of muscle tissue. This process is influenced by factors such as the ambient temperature, the presence of bacteria, and the duration of time elapsed since death.
**Why the Correct Answer is Right**
The correct answer is related to the fact that after death, muscles undergo rigor mortis, which is a temporary stiffening of the muscles due to the accumulation of lactic acid and the contraction of actin and myosin filaments. This process can be influenced by the ambient temperature, with warmer temperatures leading to a more rapid onset of rigor mortis.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it is true that muscles undergo rigor mortis after death, which is characterized by a stiffening of the muscles due to the contraction of actin and myosin filaments.
**Option B:** This option is incorrect because it is true that autolysis occurs in muscles after death, resulting in the breakdown of muscle tissue due to the action of lysosomal enzymes.
**Option C:** This option is incorrect because it is true that muscles undergo putrefaction after death, which is characterized by the breakdown of muscle tissue due to the action of bacteria.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that the duration of rigor mortis can provide information about the post-mortem interval, with rigor mortis typically lasting around 2-4 days in a temperate climate.
**Correct Answer: A.**