The hormone which promotes protein anabolism, absorption of calcium from the bowel and retards use of blood glucose for ATP production

Options

A. Melatonin
B. Adrenaline
C. Growth hormone
D. Insulin

Answer

To determine the hormone that promotes protein anabolism, absorption of calcium from the bowel, and retards the use of blood glucose for ATP production, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Functions Described**:
- The hormone must promote **protein anabolism** (building of proteins).
- It should aid in the **absorption of calcium** from the bowel.
- It must **retard the use of blood glucose** for ATP production (meaning it does not allow glucose to be used for energy).

2. **Review the Options**:
- The options provided are:
- A) Melatonin
- B) Adrenaline
- C) Growth Hormone
- D) Insulin

3. **Analyze Each Option**:
- **Melatonin**: Primarily involved in regulating sleep cycles and pigmentation; does not relate to protein anabolism or calcium absorption.
- **Adrenaline**: Known as the fight-or-flight hormone; it prepares the body for quick energy use and does not promote protein anabolism or calcium absorption.
- **Insulin**: Regulates blood glucose levels by promoting its uptake and storage, which contradicts the requirement of retarding glucose use for ATP production.
- **Growth Hormone**: Stimulates protein synthesis (anabolism), promotes calcium absorption in the intestines, and inhibits glucose usage for energy, thus aligning perfectly with all three functions described.

4. **Conclusion**:
- Based on the analysis, the hormone that meets all the criteria is **Growth Hormone**.

### Final Answer:
The hormone which promotes protein anabolism, absorption of calcium from the bowel, and retards the use of blood glucose for ATP production is **Growth Hormone** (Option C).

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