2. Nervous Control of the Alimentary Tract Flashcards
What controls Gut Motility?
The Enteric Nervous System
What forms the Enteric Nervous System?
- The Sub-Mucosal Plexus
2. The Mesenteric Plexus
Can you consciously control your Gut? And, if not, what must control it?
No, It is under Autonomic Control
What 2 Reflexes can the Autonomic Control of the Nervous System be split into?
- Long Reflexes
2. Short Reflexes
What is the Pathway of Long Reflexes?
These travel from the Gut to the Spinal Cord, and then back to the Gut
What are the Long Reflexes formed from?
The Parasympathetic Nervous System
What is the Pathway of Short Reflexes?
These are contained within the Gut Wall itself, and are made up of the Enteric Nervous System
Is it a good, or bad, habit to have both Sympathetic and Parasympathetic Stimulation of the Gut simultaneously?
Bad
What is an example of a bad habit due to simultaneous Sympathetic and Parasympathetic Stimulation of the Gut?
Exercising straight after Eating, as both systems with be at a detrimental effect due to this
Where does the Parasympathetic Stimulation of the Gut Tube come from?
The Vagus Nerve (Cranial Nerve X)
Does the Vagus Nerve affect Salivation?
No, it does not innervate the Head and Neck
What is Salivation controlled by?
- The Facial Nerve (Cranial Nerve VII)
2. The Glossopharyngeal Nerve (Cranial Nerve IX)
What is the action of the Parasympathetic Nervous System?
This is always Stimulatory, to increase Motility and Secretion
Where does the Sympathetic Stimulation of the Gut Tube come from?
This is controlled by the Splanchnic Nerve
What is the action of the Sympathetic Nervous System?
This is always Inhibitory, to decrease Motility and Secretion
