What part of the autonomic nervous system causes an increase in digestive tract mobility?
Stimulation of the Parasympathetic nervous system causes an
increase in digestive tract mobility.
When stimulated the parasympathetic post-ganglionic neurons
release a hormone called Acetylcholine. This causes the Digestive
tract to increase its contractions.
Counteracting this increase in digestive tract mobility is the
sympathetic nervous system, which releases a hormone called
noradrenaline which slows down the digestive tracts
contractions.
This is how the Parasympathetic Nervous System gets the name
"rest and digest"