Body Fluids and Circulation Question 79
79. The correct route through which pulse-making impulse travels in the heart is
[1995]
(a) AV node $arrow$ bundle of His $arrow SA$ node Purkinje fibres $arrow$ heart muscles
(b) AV node $arrow$ SA node $arrow$ Purkinje fibres $arrow$ bundle of His $arrow$ heart muscles
(c) SA node $arrow$ Purkinje fibre $arrow$ bundle of His $arrow$ AV node $arrow$ heart muscles
(d) SA node $arrow AV$ node $arrow$ bundle of His $arrow$ Purkinje fibre $arrow$ heart muscles
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Answer : d
Hints & Solutions
(d) The pulse making impulse travels in the heart in the order of SA node $arrow AV$ node $arrow$ bundle of His $arrow$ Purkinje fibres $arrow$ heart muscles.
