Mass of self-excitatory nodal fibres in mammalian heart is represented by:
A.SA-Node
B.Semilunar valves at the entrances of main aortae
C.Bicuspid and tricuspid valves
D.None of these
Category: Circulatory System Physiology Mcqs
How many times dose the heart of frog beat per minute:
A.54 times
B.64 times
C.72 times
D.84 times
Which of these are conducting elements in the heart of mammals:
A.SA-Node
B.AV-Node
C.Bundle of His
D.All of these
By beating 72 times per minute, our heart pumps about how much of blood into the body:
A.2 litres
B.Litres
C.5 litres
D.7 litres
