The pacemaker, which initiates and maintains the heartbeat, is located in the wall of which one of the following chambers of heart ?

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Q: 29 (IES/2007)
The ‘pacemaker’, which initiates and maintains the heartbeat, is located in the wall of which one of the following chambers of heart ?
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question_subject: 

Science

question_exam: 

IES

stats: 

0,14,10,2,14,8,0

keywords: 

{'right ventricle': [0, 0, 2, 1], 'left ventricle': [0, 0, 8, 0], 'pacemaker': [1, 0, 0, 0], 'heartbeat': [0, 0, 2, 0], 'chambers': [2, 0, 3, 1], 'left atricle': [0, 0, 1, 0], 'heart': [1, 0, 0, 0], 'right atricle': [0, 0, 1, 0], 'wall': [1, 0, 2, 3]}