In the phase sequence, which phase is the fourth phase?

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Prepare for the Ivy Tech Anatomy and Physiology II (APHY 102) Heart Test with multiple-choice questions, detailed explanations, and study resources. Enhance your understanding and excel in your exam!

Multiple Choice

In the phase sequence, which phase is the fourth phase?

Explanation:
In the cardiac cycle, the phase where the ventricles actively push blood into the great vessels occurs after the ventricles have cleared the way by building enough pressure. Once ventricular pressure exceeds arterial pressure, the semilunar valves open and blood is ejected into the aorta and pulmonary trunk. This ventricular ejection phase is identified as the fourth phase in this phase sequence. After ejection, the ventricles begin to relax and the semilunar valves close, starting isovolumetric relaxation.

In the cardiac cycle, the phase where the ventricles actively push blood into the great vessels occurs after the ventricles have cleared the way by building enough pressure. Once ventricular pressure exceeds arterial pressure, the semilunar valves open and blood is ejected into the aorta and pulmonary trunk. This ventricular ejection phase is identified as the fourth phase in this phase sequence. After ejection, the ventricles begin to relax and the semilunar valves close, starting isovolumetric relaxation.

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