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Adrenaline increases...

Adrenaline increases

A

Blood pressure

B

Heart beat

C

Both A and B

D

Arteriosclerosis.

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The correct Answer is:
### Step-by-Step Solution: 1. **Understanding Adrenaline**: Adrenaline, also known as epinephrine, is a hormone produced by the adrenal medulla. It plays a crucial role in the body's response to stress or emergencies. 2. **Function of Adrenaline**: When the body is under stress, adrenaline is secreted to help maintain homeostasis. It prepares the body for a 'fight or flight' response. 3. **Effects of Adrenaline**: - **Increases Heart Rate**: Adrenaline stimulates the heart to beat faster, which increases the amount of blood pumped throughout the body. - **Increases Blood Pressure**: Along with increasing heart rate, adrenaline also causes blood vessels to constrict, leading to an increase in blood pressure. 4. **Analyzing the Options**: - **Option A: Blood Pressure** - True, adrenaline increases blood pressure. - **Option B: Heart Beat** - True, adrenaline increases heart rate. - **Option C: Both A and B** - Since both blood pressure and heart rate increase, this option is correct. - **Option D: Arteriosclerosis** - This is incorrect as arteriosclerosis refers to the thickening of artery walls and is not directly caused by adrenaline. 5. **Conclusion**: The correct answer is **both A and B**, meaning adrenaline increases both blood pressure and heart rate.
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