Q. Which one of the following is a matching pair?
A. Luub- sharp closure of AV valves at the beginning of ventricular systole
B. Dup- sudden opening of semilunar valves are the beginning of ventricular diastole
C. pulsation of the radial artery-valves in the blood vessels
D. initiation of heart beat- purkinje fibres
Answer: Luub- sharp closure of AV valves at the beginning of ventricular systole
