Chapter 3: Autonomic Nervous System- Parasympathetic (Craniosacral Division)

Question 1

What are the steps of the parasympathetic nervous system?

Answer 1

1) Preganglionic (first order) neurons in brain and sacral spinal cord (S2-S4)
send preganglionic fibers to
2) Ganglia in or near target organs- Pregangloionic fibers release ACh (excitatory), stimulating ganglionic (second-order) neurons
that send postganglionic fibers to
3) Target organs- Postganglionic fibers release ACh at neuroeffector junction
4) Feed or breed response