If the radius of blood vessels of a person decreases, then his/her blood pressure will :

Correct option is B

The correct answer is (B) Increase

• The blood pressure is influenced by several factors, including the radius of blood vessels.

• According to Poiseuille’s Law, blood flow and pressure are inversely proportional to the radius of the blood vessels. A decrease in the radius of the blood vessels leads to increased resistance to blood flow.

• When resistance increases, the heart has to pump harder to maintain blood flow, which increases the blood pressure.

Information Booster:

• Blood pressure = Cardiac output × Peripheral resistance.

• If the radius of blood vessels decreases, resistance increases, which in turn raises blood pressure.

• Conditions like arteriosclerosis (hardening of arteries) and atherosclerosis (plaque buildup in arteries) can decrease the radius of blood vessels, leading to higher blood pressure.