QuestionJuly 21, 2025

02 Multiple Choice caused by the closure of the AV valves at the beginning of ventricular contraction. A the second heart sound. the heart sound caused by the opening of valves. All of the above are true.

02 Multiple Choice caused by the closure of the AV valves at the beginning of ventricular contraction. A the second heart sound. the heart sound caused by the opening of valves. All of the above are true.
02 Multiple Choice
caused by the closure of the AV valves at the beginning of ventricular
contraction.
A the second heart sound.
the heart sound caused by the opening of valves.
All of the above are true.

Solution
4.5(199 votes)

Answer

None of the given options are true. Explanation 1. Identify the correct statement The closure of the AV valves at the beginning of ventricular contraction causes the first heart sound, not the second. The second heart sound is caused by the closure of the semilunar valves. The opening of valves does not produce a heart sound. 2. Evaluate options Option A is incorrect because it describes the first heart sound. The statement about heart sounds caused by the opening of valves is incorrect as well.

Explanation

1. Identify the correct statement<br /> The closure of the AV valves at the beginning of ventricular contraction causes the first heart sound, not the second. The second heart sound is caused by the closure of the semilunar valves. The opening of valves does not produce a heart sound.<br />2. Evaluate options<br /> Option A is incorrect because it describes the first heart sound. The statement about heart sounds caused by the opening of valves is incorrect as well.
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