Figure 20-2 Cardiac Cycle
Use Figure 20-2 to answer the following questions:
-What occurs at the area labeled "D" on the graph?
A) AV valve opens.
B) Semilunar valve opens.
C) Diastolic filling begins.
D) AV valve opens and filling of ventricles begins.
E) Ventricle contracts.
Correct Answer:
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A)aortic
A) atria are contracting.
B)
