Adrenaline is relased from the adrenal medulla under stress conditon. Which of the following can't be taken as a character of it?

Options

A. Elevates blood glucose by converting liver glycogen to glucose
B. Acceleration of rate and force of heart beat
C. Increase in breakdown of lipids
D. Constriction in arterioles of skeletal muscle

Answer

To solve the question regarding the characteristics of adrenaline released from the adrenal medulla under stress conditions, we will analyze each option provided.

### Step-by-Step Solution:

1. **Understanding Adrenaline**:
- Adrenaline, also known as epinephrine, is a hormone released by the adrenal medulla during stress or emergency situations. It is often referred to as the "fight or flight" hormone.

2. **Analyzing the Options**:
- **Option A**: "Elevates blood glucose by converting liver glycogen to glucose."
- This is a correct characteristic of adrenaline. During stress, adrenaline stimulates the conversion of glycogen stored in the liver into glucose, increasing blood sugar levels to provide energy.

- **Option B**: "Acceleration of rate and force of heartbeat."
- This is also a correct characteristic. Adrenaline increases heart rate and the force of heart contractions, which enhances blood flow to vital organs and muscles during stress.

- **Option C**: "Increase in breakdown of lipids."
- This statement is correct as well. Adrenaline promotes the breakdown of lipids (fats) into fatty acids, which can be used as an energy source during stressful situations.

- **Option D**: "Constriction in arterioles of skeletal muscles."
- This statement is incorrect. Adrenaline typically causes vasodilation (widening of blood vessels) in skeletal muscles to increase blood flow and oxygen supply, rather than constriction.

3. **Conclusion**:
- The question asks for the characteristic that cannot be taken as a feature of adrenaline. Since option D describes a function that is not true for adrenaline, it is the correct answer.

### Final Answer:
- The characteristic that cannot be taken as a character of adrenaline is **Option D: Constriction in arterioles of skeletal muscles**.