Immersion of an upright adult to chest level in water increases the

A. True 100 mmHg is equivalent to 1.36 metres of H2O.

B. True Due to pressure on capacity vessels in the lower body.

C. False Increased central blood volume reflexly lowers resistance.

D. True Increased central blood volume causes diuresis, perhaps via atrial natriuretic hormone.

E. False It decreases transmural pressure and so protects the vessels against distension due to gravitational forces.