As the intensity of dynamic exercise increases, which of the following sets of responses occurs?

Diastolic blood pressure does not rise with dynamic exercise intensity because peripheral vasodilation in working muscles keeps diastolic pressure stable, which is a key distinction between dynamic and static exercise hemodynamics.

As exercise intensity increases, cardiac output rises and drives systolic blood pressure upward proportionally. Diastolic blood pressure is maintained or only minimally changes because peripheral vascular resistance decreases as skeletal muscle arterioles dilate to accommodate greater blood flow, counterbalancing the elevated cardiac output and preventing diastolic pressure from climbing.

Both stroke volume and cardiac output increase substantially with rising dynamic exercise intensity - cardiac output can increase four to six fold from rest to maximal effort - so stating they remain unchanged is physiologically incorrect.

Stroke volume increases with exercise intensity up to moderate-to-high levels via the Frank-Starling mechanism and sympathetic stimulation, not decreases, making this response incorrect.