Increase in temperature during first 2 hours after death is due to –
**Core Concept**
Post-mortem changes in body temperature are influenced by the heat of life, also known as the 'calorific effect of life'. This concept describes the residual metabolic activity in the body after death, which can cause a temporary increase in body temperature.
**Why the Correct Answer is Right**
The increase in temperature during the first 2 hours after death is primarily due to the residual metabolic activity of the muscles, particularly in the abdominal and thoracic cavities. This activity is mediated by the ATP-dependent processes in the muscle cells, which continue to generate heat even after the cessation of neural control. The heat generated by this process can lead to a rise in body temperature, often referred to as the 'calorific effect of life'.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is likely incorrect because it does not accurately describe the post-mortem changes in body temperature.
**Option B:** This option is incorrect because it is not directly related to the post-mortem changes in body temperature.
**Option C:** This option is incorrect because it is not a recognized cause of the increase in temperature during the first 2 hours after death.
**Clinical Pearl / High-Yield Fact**
It is essential to note that the increase in temperature during the first 2 hours after death is a normal post-mortem phenomenon and should not be mistaken for signs of life or resuscitation.
**Correct Answer: C. The calorific effect of life.**