One complete cardiac cycle takes…….. seconds.
a) 0.5
b) 0.8
c) 0.9
d) 1.2
During the first phase of cardiac cycle i.e. diastole, blood flows in……chambers passively.
a) two auricles
b) both ventricles
c) left auricle and ventricle
d) all four chambers
During the second phase of cardiac cycle, i.e. systole.……contract/s together for about 0.1 second filling the ……… completely with blood.
a) left atrium-left ventricle
b) left atrium-right ventricle
c) both atria-both ventricles
d) both ventricles-aorta and pulmonary artery
During the third phase of cardiac cycle .……contract/s together for about 0.3 second pouring the ………completely with blood.
a) left atrium-left ventricle
b) left atrium-right ventricle
c) both atria-both ventricles
d) both ventricles-aorta and pulmonary artery
Normal rate of heart beat in a healthy human being is……..beats per minute.
a) 60
b) 65
c) 72
d) 80
Explanation: it increase up to 120 during strong muscular exercise like running
The lub sound produced during heart beat during the closing of the……during the contraction of ventricle in systole.
a) semilunar valve
b) bicuspid valve
c) tricuspid valve
d) AV valves
