Maximal exercise leads to an increase in

A. True Due mainly to the increase in the force of ventricular ejection.

B. False This falls markedly due to vasodilatation in muscle, heart and skin.

C. True Since the muscles may have to work in anaerobic conditions.

D. True This results from the rise in hydrostatic pressure in muscle capillaries.

E. False This decreases, probably due to reflex vasoconstriction in the kidneys and increased release of vasopressin.