Question

• Assertion: Smoking can raise blood pressure and increase heart rate.
• Reason: Nicotine stimulates adrenal glands to release adrenaline and noradrenaline into the blood circulation, both of which raise blood pressure and increase heart rate.

Options

• Both A and R are true and R is the correct explanation of A.

• Both A and R are true and R is not the correct explanation of A.

• A is true but R is false.

• A is false but R is true.

Answer 1

Both A and R are true and R is the correct explanation of A.

Explanation:

Tobacco is consumed. It includes nicotine, an alkaloid that stimulates the adrenal gland, leading it to release adrenaline and nor-adrenaline, resulting in elevated blood pressure and an accelerated heart rate.