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How many Korotkoff sounds are recognized, and how many are normally recorded?
AThree are recognized and two recorded
BFive are recognized and two recorded
CFive are recognized and three recorded
DTwo are recognized and one recorded
Answer & Solution
Correct answer: B. Five are recognized and two recorded
1. Turbulent flow under a deflating cuff produces the Korotkoff sounds heard through a stethoscope.
2. Five such sounds are recognized in total.
3. Only two are normally written down: the first sound, which marks systolic pressure, and the last, which marks diastolic pressure.
4. Counting three or fewer recognized sounds understates the full set that Korotkoff described.
_Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 20 "The Cardiovascular System: Blood Vessels and Circulation", section 20.2 Blood Flow, Blood Pressure, and Resistance_
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