GI ML: 6 Flashcards
What is the pathway of the large intestine?
-cecum (w/appendix)
-ascending colon
-transverse colon
-descdending colon
-sigmoid colon
-rectum
What is the function of the large intestine
storing and drying feces
How is the structure of the large intestine different than the small intestine?
3x wider but shorter in length
What is the job of the illeocecal sphincter
keeps bacteria out of the small intestine
What is the job of the appendic
it keeps a colony of healthy bacteria to repopulate your gut in cases when disaster or antibiotics wipes them out
What is the secretion of the large intestine
protective alkaline mucus with bicarb and K+
What is the digestion of the large intestine
bacterial breakdown of complex polysaccharides
What is the absorption of the large intestine
products of bacterial metabolism
Vitamin K
NaCl
1.4 L/Day of water
What is the first motility of the large intestine?
segmentation also known as haustrations
What are haustrations
occur every 30 minutes, shuffling back and forth motility and aids with drying function
What do haustral sacs do
they shrink and expand back out
What is the second motility of the large intestine
mass movement
What is the peristaltic wave in the large intestine
starts at ascending colon and rapidly travels to rectum
What is the mass movement (peristalic wave) triggered by?
gastrin in the gastric phase of regulation
What is the job of mass movement
packs the rectum with feces, leads to defecation reflex
