Multiple Choice
Figure 18- 2 Cardiac Cycle
Use Figure 18- 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 refilling begins
D) both A and C
E) both B and C
Correct Answer:

Verified
Correct Answer:
Verified
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