Select ALL of the following which are TRUE about the parasympathetic nervous sys

Question

Select ALL of the following which are TRUE about the parasympathetic nervous system: preganglionic neurons emerge from cranial and sacral nerves parasympathetic influence causes blood vessels to constrict preganglionic axons are generally longer than post-ganglionic axons parasympathetic influence causes an increase in digestive motility and secretions preganglionic axons emerge from thoracic and lumbar nerves both preganglionic and post-ganglionic axons secrete Ach preganglionic axons secrete Ach;post-ganglionic axons secrete NE

Explanation / Answer

1.preganglionic neurons emerge from cranial and sacral nerves.

2.parasympathetic influence causes blood vessels to constrict.

3.parasympathetic influence causes an increase in digestive motility and secretions.

4.Both preganglionic and postganglionic axons secrete acetylcholine.

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