Question

The neuron cell bodies in the wall of the digestive tract are primarily:

a. Parasympathetic post-ganglionic neurons

b. Parasympathetic pre-ganglionic neurons

c. Sympathetic post-ganglionic neurons

d. Sympathetic pre-ganglionic neurons

Answer 1

The neuron cell bodies located in the wall of the digestive tract are primarily postganglionic parasympathetic neurons, part of the enteric nervous system, facilitating the rest-and-digest functions by releasing acetylcholine.

Step-by-step explanation:

The neuron cell bodies in the wall of the digestive tract are primarily postganglionic parasympathetic neurons. The enteric nervous system, which is a division of the autonomic nervous system, consists of these neurons. The parasympathetic system is active during rest-and-digest states, stimulating digestive function through these neurons.

Activation of stretch receptors in the digestive tract, for example, leads to direct activation of these neurons, causing smooth muscle contraction without central nervous system involvement. These postganglionic neurons are able to release acetylcholine (ACh), which then acts on muscarinic receptors in digestive tract tissues to facilitate digestive processes.