Figure 20-2 Cardiac Cycle

Use Figure 20-2 to answer the following questions:
-What occurs at the circle labeled "4" on the graph?

Name: Figure 20-2 Cardiac Cycle Use Figure 20-2 to answer the following questions: -What occurs at the circle labeled "4" on the graph?
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Question

Figure 20-2 Cardiac Cycle
 
Use Figure 20-2 to answer the following questions:
-What occurs at the circle labeled "4" on the graph?

Quizplus · Accepted Answer

Isovolumetric ventricular contraction occurs when the ventricles are contracting but the atrioventricular valves are closed, so no blood is entering or leaving the ventricles. This causes a rapid increase in ventricular pressure.