| Atropine, found in deadly nightshade, interferes with chemical messages released within the parasympathetic nervous system. |
| This includes those of the parasympathetic nervous system in the heart, glandular tissue, and smooth muscle. |
| The constrictor muscle is supplied by the parasympathetic nervous system, and the dilator by the sympathetic nervous system. |
| The sympathetic nervous system pumps the body up, but when you take a deep breath the parasympathetic nervous system kicks in and starts to wind the system down. |
| The autonomic nervous system is divided into two more systems: the sympathetic nervous system and the parasympathetic nervous system. |
| It also inhibits the action of acetylcholine at the postganglionic nerve endings of the parasympathetic nervous system. |
