Figure 20-2 Cardiac Cycle

question 169

Multiple Choice

Figure 20-2 Cardiac Cycle
Use Figure 20-2 to answer the following question:
-What occurs at the area labeled "C" on the graph?

• A)AV valve opens
• B)AV valve closes
• C)ventricular filling begins
• D)semilunar valve closes
• E)semilunar valve opens

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