In old age arteries carrying blood in the human body become narrow resulting in an increase in the blood pressure. This follows from

Question

In old age arteries carrying blood in the human body become narrow resulting in an increase in the blood pressure. This follows from (A) Pascal's law (B) Stokes' law (C) Bernoulli's principle (D) Archimedes' principle

Tardigrade Admin · Accepted Answer

According to the equation of continuity,

A v =

constant
It means, as area increases, velocity also decreases.
Thus, as blood flows from narrow arteries to wider one, velocity decreases. According to Bernoulli's theorem

P + \frac{1}{2} ρ v^{2}

= constant
It means, as velocity decreases, pressure increases. Thus, when arteries become narrow, blood pressure increases.

Q. In old age arteries carrying blood in the human body become narrow resulting in an increase in the blood pressure. This follows from

Pascal's law

Stokes' law

Bernoulli's principle

Archimedes' principle