Biology / Unit 12 Bio 2859 short lesson, about 20 seconds
Parasympathetic Nervous System
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The idea
The parasympathetic nervous system produces "rest and digest" responses, slowing heart rate and stimulating digestion, resetting organ function after sympathetic activation subsides.
In practice
Acetylcholine released by parasympathetic postganglionic neurons slows heart rate and stimulates digestive activity.
Where people slip
Sympathetic and parasympathetic systems are typically antagonistic on the same organs, not independent, unrelated controls.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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