Doctors use stethoscope to hear the sound; produced during each cardiac cycle. The second sound is heard when
a) AV node receives signal from SA node
b) AV valves open up
c) Ventricular walls vibrate due to gushing of blood from atria
d) Semilunar valves close down after the blood flows into vessels from ventricles
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If you suspect major deficiency of antibodies in a person, to which of the following would you look for confirmatory evidence?
a) Serum globulins
b) Fibrinogin in plasma
c) Serum albumins
d) Haemocyte
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