NEET 2004 Biology question
The cardiac pacemaker in a patient fails to function normally. The doctors find that an artificial pacemaker is to be grafted in him. It is likely that it will be grafted at the site of -
Answer: (2)
Solution
The sinuatrial (SA) node, located in the upper right corner of the right atrium, generates action potentials at the highest rate (about 70-75 per minute) and therefore acts as the natural pacemaker that initiates and sets the rhythm of the heartbeat. When it fails, an
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