Body Fluids and Circulation Question 82
82. Pacemaker of heart is
[1994]
(a) AV node
(b) Bundle of His
(c) SA node
(d) Purkinje fibres
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Answer : c
Hints & Solutions
(c) Sino-Auricular node (S.A node) present in the walls of right auricle has a myogenic initiation of heartbeat in a regular fashion and controls the pace of heartbeat.