AIIMS2008Zoology-Circulatory System
AIIMS 2008 Zoology Heart Sounds MCQ Question
Type: MCQ-conceptual-Medium-Class 11
Which one of the following is a matching pair?
A
Lubb-Sharp closure of AV valves at the beginning of ventricular systole.
B
Dup-Sudden opening of semilunar valves at the beginning of ventricular diastole.
C
Pulsation of the radial artery-Valves in the blood vessels.
D
Initiation of the heart beat - Purkinje fibres.
Correct Answer
Option A
Detailed Explanation
Lubb (first sound, systolic sound) is the first heart sound which is low pitched, not very loud, of long duration.
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