Cardiac activity could be moderated by the autonomic nervous 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 stimulates heart rate but decreases stroke volume
4. The sympathetic system stimulates heart rate but decreases stroke volume

The autonomic regulation of cardiac activity is carried out by a neural center located in:

Sympathetic stimulation would lead to:
1. increased heart rate.
2. increased stroke volume.
3. vasoconstriction in visceral blood vessels.
4. all of the above.