Question

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

• A. Decrease
• B. Increase
• C. Remain Same
• D. Become zero

Hint:

When the radius of blood vessels decreases, the resistance to blood flow increases, which leads to higher blood pressure.

Answer 1

The Correct Option is B

According to the principle of fluid dynamics, blood pressure increases when the radius of blood vessels decreases. This is due to the increased resistance to blood flow, which occurs when the vessels are narrower. The relationship between pressure and vessel radius is described by Poiseuille’s law.
Thus, the correct answer is (B) Increase.