First protein to be broken down for energy in prolonged starvation is from-
**Core Concept**
In prolonged starvation, the body undergoes a series of adaptations to conserve energy and maintain vital functions. The initial response involves the breakdown of stored energy sources, including glycogen, fat, and eventually, protein.
**Why the Correct Answer is Right**
The correct answer is the first protein to be broken down for energy in prolonged starvation, which is a vital adaptation to maintain blood glucose levels and prevent ketoacidosis. This process is mediated by the hormone glucagon, which stimulates the breakdown of muscle proteins to release amino acids into the bloodstream. The amino acids are then converted to ketone bodies, which are an alternative energy source for the brain and other organs.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because while it is true that the body eventually breaks down muscle proteins for energy in prolonged starvation, it is not the first protein to be broken down.
**Option B:** This option is incorrect because it is not a protein that is typically broken down for energy in starvation.
**Option C:** This option is incorrect because while it is a protein that is broken down in starvation, it is not the first protein to be broken down.
**Clinical Pearl / High-Yield Fact**
In prolonged starvation, the body breaks down muscle proteins to maintain blood glucose levels and prevent ketoacidosis. This adaptation is mediated by the hormone glucagon, which stimulates the breakdown of muscle proteins to release amino acids into the bloodstream.
**Correct Answer: C. Albumin. Albumin is the first protein to be broken down for energy in prolonged starvation.