A person is undergoing prolonged fasting. His urine would contain absormal quantities of

Options

A. Fats
B. Amino acids
C. Ketones
D. Glucose

Answer

### Step-by-Step Solution:

1. **Understanding Prolonged Fasting**: When a person undergoes prolonged fasting, the body enters a state of starvation. This means that the body has depleted its immediate energy reserves and must find alternative sources of energy.

2. **Hormonal Response**: In response to fasting, the body releases the hormone glucagon. Glucagon plays a crucial role in maintaining blood glucose levels by promoting the breakdown of glycogen stored in the liver and muscles into glucose.

3. **Initial Energy Source**: For the first 24 to 72 hours of fasting, the body primarily utilizes glycogen stores. This means that glucose is still available for energy during this initial phase.

4. **Depletion of Glycogen**: Once glycogen stores are depleted (after about 72 hours), the body needs to find another source of energy. At this point, it begins to break down proteins to release amino acids.

5. **Amino Acid Breakdown**: Proteins are made up of amino acids. When the body degrades proteins for energy, it leads to an increase in the concentration of amino acids in the bloodstream.

6. **Urine Composition**: As the concentration of amino acids in the blood increases, the kidneys filter out excess amino acids, leading to their presence in the urine. This can result in darker urine due to the higher concentration of these substances.

7. **Formation of Ketones**: In addition to amino acids, prolonged fasting can also lead to the production of ketones as the body begins to utilize fat stores for energy. However, the primary abnormal quantity in urine during the early stages of prolonged fasting is amino acids.

8. **Conclusion**: Therefore, the urine of a person undergoing prolonged fasting would contain abnormal quantities of amino acids.

### Final Answer: Amino Acids

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