Lecture 8.2: Control of the Gastrointestinal System Flashcards
1
Q
What are the 2 Control Systems of the GI system?
A
1) The Long & Short Reflexes/Enteric nervous system
2) GI peptide reflexes
2
Q
What are Long Reflexes?
A
- Integrated within in the CNS
- May originate in or outside of the GI tract
- Feedforward & emotional reflexes are initiated and
integrated entirely outside the GI tract - Called cephalic reflexes
3
Q
What are Short Reflexes?
A
- Integrated in the enteric nervous system
- Initiated by changes in pH, distension, osmolarity,
products of digestion - Submucosal plexus contains the sensory neurons
- Afferent information to ganglia
- Efferent information to submucosal and myenteric
plexuses for control of secretion, motility and growth
4
Q
Long and Short Reflex Pathway
A
Slide 4
5
Q
Which part of the Nervous System deals with Long Reflexes?
A
- Extrinsic nervous system
- Autonomic central nervous system
6
Q
Which part of the Nervous System deals with Short Reflexes?
A
Intrinsic (enteric) nervous system entirely within the GI
system
