“Fight or Flight” vs “Rest and Digest”. For the most part these are pretty obvious reactions, but I still think there are importance concepts to have. I have this nifty chart below highlighting most the prominent structures with their corresponding functions and then a few links to websites that I think do a good job of further explaining things into more detail for those of you who like details.
| Organ | Sympathetic Function | Parasympathetic Function |
|---|---|---|
| Eye | Dilates pupil | Contracts pupil |
| Heart | Increases rate and force of contraction | Decreases rate and force of contraction |
| Lungs | Dilates bronchioles | Constricts bronchioles |
| GI Sphinters | Contracts | Relaxes |
| Digestive tract | Inhibits peristalsis | Stimulates motility and secreation |
| Kidney | Increases renin secretion | Increases renin secretion |
| Oral/Nasal Mucosa | Mucus production reduced | Mucus production increased |
| Sex Organs | Ejaculation | Erection |
now on to the links:
A nice little flash video from Georgia South Western
An old school website talking about the autonomic nervous system
good ol wikipedia – I do not recommend wiki for most things but they do have great pictures
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