Cardiac activity could be moderated by the autonomous neural system.

Tick the correct answer.
 

1. The parasympathetic system stimulates heart rate and stroke volume
2. The sympathetic system stimulates heart rate and stroke volume
3. The parasympathetic system decreases the heart rate but increase stroke volume
4. The sympathetic system decreases the heart rate but increase stroke volume

Subtopic:  Regulation of Cardiac Activity |
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From NCERT
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