Question

Blood flows through an artery that is partially blocked. As the blood moves from the wider region into the narrow region, the blood speed

- alternately increases and then decreases.

- increases.

- decreases.

- drops to zero.

- stays the same

Answer 1

Answer:

option A

Explanation:

Using continuity equation

  A v = constant

  $A\ \alpha \ \dfrac{1}{v}$

from the above expression, we can say that the area is inversely proportional to velocity. When area increases velocity tends to decrease or vice versa.

So, when blood flows from the wider region into the narrow region the blood speed will increase.

Hence, the correct answer is option A