Cardiac Cycle (part 2: pressure changes)

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from a region of high pressure to a region of low pressure

In what direction does blood flow through the heart?

atrial contraction

Atrial pressure is greater than ventricular pressure during which phase of the cardiac cycle?

when ventricular pressure becomes greater than atrial pressure

At what point during the cardiac cycle does the AV valve close?

when ventricular pressure becomes greater than aortic pressure

At what point in the cardiac cycle does the semilunar valve open?

ventricular ejection

Ventricular pressure is greater than aortic pressure during which phase of the cardiac cycle?

when pressure in the ventricle becomes less than aortic pressure

At what point in the cardiac cycle does the semilunar valve close?

The semilunar and AV valves are closed.

Isovolumetric relaxation is characterized by which of the following?

when ventricular pressure becomes greater than atrial pressure

At what point in the cardiac cycle does the AV valve open?

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