The dub sound is produced during heart beat during the closing of the……in the beginning of the diastole.
a) semilunar valve
b) bicuspid valve
c) tricuspid valve
d) AV valves
During the cardiac cycle, every time heart pours about…….ml of blood in to aorta with great pressure.
a) 72
b) 60
c) 85
d) 100
What is the speed of blood flow in aorta?
a) 425cm/sec
b) 120cm/sec
c) 100cm/sec
d) 10cm/sec
What is the speed of blood flow in capillaries?
a) greater than 1mm/min
b) less than 1mm/min
c) greater than 2mm/min
d) less than 2mm/min
The continuous working of heart is due to…………..
a) SA node
b) purkinji fibers
c) AV node
d) all of these
Explanation: SA node is also known as pacemaker
Artificial heart pace maker is implanted near the …….
a) SA node
b) purkinji fibers
c) AV node
d) bundle of HIS
