The second heart sound differs from the first heart sound in that it is
belongs to book: MCQs & EMQs in Human Physiology|Ian Roddie, William F M Wallace|6th edition| Chapter number:-| Question number:71
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belongs to book: MCQs & EMQs in Human Physiology|Ian Roddie, William F M Wallace|6th edition| Chapter number:-| Question number:71
total answers (1)
A. False This applies to both heart sounds.
B. False It is about 20 per cent shorter.
C. True About 50 Hz compared with 35 Hz for the first sound.
D. False Both may be split due to asynchronous valve closure.
E. True The first sound is due to ventricular systole; the second occurs during ventricular relaxation when the aortic valves snap shut as ventricular pressure falls below aortic.
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