Question

Consider the following statements and choose the correct option.
Statement 1: In the lubb phase of a heartbeat, the ventricles contract
Statement 2. In the dubb phase of a heartbeat, the cuspid valves close
A Statement 1 is true and staternent 2 is false
B. Staternent 1 is false and statement 2 is true,
C Both staternents are true.
D Both staternents are false​

Answer 1

Answer:

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Explanation:

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Answer 2

Answer:

D. Both statements are false.

Explanation:

During systole, the ventricles contract. The increasing pressure in the ventricles closes the atrioventricular valves, creating the "lub" sound. . The first sound, "lub", is associated with the closing of the AV valves. The second sound, "dub", is associated with the closing of the semilunar valves.