Nicotine results in increased heart rate and blood pressure, by stimulating the release of

Options

A. Vasopressin
B. Adrenaline
C. Insulin
D. Thyroxine

Answer

**Step-by-Step Solution:**

1. **Understanding Nicotine:**
- Nicotine is a stimulant drug that affects the nervous system. It primarily acts on the parasympathetic nervous system.

2. **Identifying the Effects of Nicotine:**
- When nicotine is introduced into the body, it leads to various physiological changes, including an increase in heart rate and blood pressure.

3. **Mechanism of Action:**
- Nicotine stimulates the release of certain hormones in the body. One of the key hormones released is adrenaline (also known as epinephrine).

4. **Role of Adrenaline:**
- Adrenaline is released from the adrenal medulla. Once in the bloodstream, it acts on various target organs, including blood vessels.

5. **Effects of Adrenaline on the Body:**
- The release of adrenaline causes the constriction of blood vessels, which leads to an increase in blood pressure. Additionally, it increases heart rate, further contributing to the overall stimulatory effect on the cardiovascular system.

6. **Conclusion:**
- Therefore, the correct answer to the question is that nicotine results in increased heart rate and blood pressure by stimulating the release of adrenaline.

**Final Answer:**
- The correct option is **B) Adrenaline**.

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