Which hormone causes dilation of blood vessels, increased oxygen consumption and glucogensis?

Options

A. Glucagon
B. ACTH
C. Insulin
D. Adrenaline

Explanation

To answer the question "Which hormone causes dilation of blood vessels, increased oxygen consumption, and glucogenesis?", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for a hormone that has three specific effects: dilation of blood vessels, increased oxygen consumption, and glucogenesis (the synthesis of glucose).

2. **Identifying the Effects**:
- **Dilation of Blood Vessels**: This effect allows for increased blood flow to various tissues.
- **Increased Oxygen Consumption**: This is essential during times of stress or emergency, as the body requires more oxygen to produce energy.
- **Glucogenesis**: This refers to the production of glucose, which is crucial for providing energy, especially during stressful situations.

3. **Considering Hormones**: We need to think about hormones that are known to have these effects. The options provided are glucagon, ACTH, insulin, and adrenaline.

4. **Analyzing Each Hormone**:
- **Glucagon**: Primarily raises blood glucose levels but does not directly cause blood vessel dilation.
- **ACTH (Adrenocorticotropic Hormone)**: Stimulates cortisol release but is not directly involved in blood vessel dilation or glucogenesis.
- **Insulin**: Lowers blood glucose levels and promotes glucose uptake but does not cause blood vessel dilation or increased oxygen consumption.
- **Adrenaline (Epinephrine)**: Known as the "fight or flight" hormone, it causes dilation of blood vessels, increases heart rate (and thus oxygen consumption), and promotes glucogenesis.

5. **Conclusion**: Based on the analysis, the hormone that causes dilation of blood vessels, increased oxygen consumption, and glucogenesis is **adrenaline** (also known as epinephrine).

### Final Answer:
**Adrenaline (Epinephrine)**

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