Final answer:
Intramural ganglia are parasympathetic ganglia embedded in the tissues of the target organ. Preganglionic fibers release ACh onto nicotinic receptors to excite the ganglionic neurons, and postganglionic fibers release ACh within the organ to induce rest-and-digest responses.
Step-by-step explanation:
The term for parasympathetic ganglia that are embedded in the tissues of the target organ is intramural ganglia. These ganglia are terminal ganglia of the parasympathetic system and are found within the walls of the target effector
Intramural ganglia are preganglionic fibers that project to these ganglia, releasing acetylcholine (ACh) onto nicotinic receptors to excite the ganglionic neurons. The postganglionic fibers from the intramural ganglia then contact the target tissues within the organ to release ACh, binding to muscarinic receptors to induce rest-and-digest responses.
The term for parasympathetic ganglia that are embedded in the tissues of the target organ is intramural ganglia. These are also known as terminal ganglia of the parasympathetic system, and they are located close to or within the walls of the target effector. When the preganglionic neurons from the brain stem or sacral spinal cord reach these ganglia, they release acetylcholine (ACh) onto nicotinic receptors to excite the ganglionic neurons. The postganglionic fibers then release ACh onto muscarinic receptors in the target tissues, inducing what is known as the rest-and-digest response.