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 |
