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Unit 2 H
ANS (para/sympathetic) chart
| Target Organ/system | Sympathetic effects | Parasympathetic effects |
|---|---|---|
| Eyes ( iris) | Stimulates dilator muscles, dilates eye pupils | Stimulates constrictor muscles: constricts eye pupils |
| Sweat Glands | Stimulates copious sweating | No effect |
| Arrector pilorum muscles | Stimulates to contract( erect hairs, goosebumps ) | No effect |
| Heart Muscle | Increases heart rate and force of heartbeat | Decreases heart rate; slows down and steadies heart |
| Digestive tract organs | Decreases activity of glands and muscles of the digestive system and constricts sphincters | Increased motility ( peristalsis) and amount of secretion by digestive organs; relaxes sphincters to allow movement of food along tract |
| Blood vessles | Constricts most vessels and increases blood pressure ; constricts vessels of abdominal viscera and skin | Little or no effect |
| Mental Activity | Increases alertness | No effect |
| Male Penis | Ejaculation (S-Shoot) | Erection (P-Point) |
| Glands (nasal,lacrimal,salivary,gastric,pancreas) | Inhibits secretory activity; causes vasoconstriction of blood vessels supplying the glands | Stimulates Secretory activity |