Question

Mean blood pressure in the brain of a standing person is _______ the blood pressure at the heart.

a. higher than
b. lower than
c. exactly the same as
d. approximately the same as

Answer 1

The mean blood pressure in the brain of a standing person is lower than the blood pressure at the heart due to the weight of the blood.

Step-by-step explanation:

The mean blood pressure in the brain of a standing person is lower than the blood pressure at the heart.

When a person is standing up, the pressure in the feet is higher than at the heart due to the weight of the blood. This is because the distance between the heart and the feet of a person in an upright position is greater, resulting in an increase in the pressure in the feet relative to that in the heart.