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Read the following statements and choose the correct option:
A. The first heart sound (lub) is associated with the closure of both semilunar valves.
B. The duration between the adjacent second heart sound and first heart sound is 0.3 seconds
C. The cardiac output is the stroke volume multiplied by the number of heartbeats per minute.
Options:
A. The first heart sound (lub) is associated with the closure of both semilunar valves.
B. The duration between the adjacent second heart sound and first heart sound is 0.3 seconds
C. The cardiac output is the stroke volume multiplied by the number of heartbeats per minute.
Solution:
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Verified Answer
The correct answer is:
A, B are incorrect but C is correct
The first heart sound (lub) is associated with the closure of the tricuspid and bicuspid valves, which occurs at the beginning of ventricular systole of a cardiac cycle.
The duration between the adjacent second heart sound (dub) and first heart sound (lub) is 0.5 seconds.
The duration between the adjacent second heart sound (dub) and first heart sound (lub) is 0.5 seconds.
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