Figure 20-2 Cardiac Cycle

Use Figure 20-2 to answer the following questions:
-What occurs at the circle labeled "4" on the graph?
A) ventricular ejection
B) sympathetic stimulation
C) isovolumetric ventricular contraction
D) isovolumetric ventricular relaxation
E) ventricular filling

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?
A) ventricular ejection 
B) sympathetic stimulation 
C) isovolumetric ventricular contraction 
D) isovolumetric ventricular relaxation 
E) ventricular filling

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.