Blood pressure in the feet when standing
Blood pressure is 120 mmHg in the arm at heart level. When the person stands, how does arterial pressure in the feet compare?
Answer B: explanation for every choice
A
Distance along the vessels doesn't lower pressure nearly as much as height adds.
B
Correct. Hydrostatic pressure adds ρgh. Over about 1.2 m of blood, that adds roughly 90 mmHg.
C
Pressure in a fluid varies with depth.
D
Gravity increases pressure lower in the column.
TakeawayHydrostatic pressure increases with depth: P = P₀ + ρgh.
Equation usedHydrostatic pressure
Next question →Reviewed 2026-11-05 by a medical student. Spot an error? Report it with question ID cp68.