GI Part 8- 1 Flashcards
What GI reflex is:
Signals from the stomach that causes evacuation of the colon
Gastrocolic
What GI reflex is:
Signals from the colon and small intestine
Inhibit stomach motility and stomach secretion
Enterogastric reflex
What GI reflex is:
Signals from the colon that inhibit emptying of ileal contents into the colon
Colonileal
The gastrocolic, enterogastric, and colonieleal reflex are from the gut to the __________ sympathetic ganglia, then back tot he GI tract?
Prevertebral
Reflexes that are entirely within the ____ _____:
Control of GI secretion, peristalsis, formation of mixing contractions, local inhibitory effects, etc
Gut wall
Reflexes from the gut to the _____ ______ or _______ and then back to the GI tract:
Control gastric motor and secretory activity
Pain reflexes
Defecation reflex
Spinal cord
Brainstem
What reflex is STRETCHING of the intestinal wall during the passage of a bolus triggers a reflex?
Peristaltic
STRETCHING of the intestinal wall during the passage of a bolus triggers a reflex that constricts the lumen behind the bolus and dilates the lumen ahead of it —> coordination of longitudinal and circular musculature —> ________ movement of chyme
Propulsive
What is a property of many syncytial smooth muscle cells (bile duct, ureters)?
Peristalsis
Simulation at any point in the gut can cause a ________ ring to appear in the circular muscle spreading them along the gut tube
Contractile
Behind the site of distention =
Longitudinal muscle _______
Circular muscle ______
Relaxes
Contracts
Distal to the site of distention=
Longitudinal muscle ________
Circular muscle ________
Contracts
Relaxes
What do excitatory motor neurons release (2)?
ACh and SP
ACh and SP = __________ of circular muscle behind the chyme and ___________ of longitudinal muscle after the chyme
Contraction x2
What type of motor neurons are NO, ATP, and VIP?
Inhibitory
