Digestion Flashcards
Ghrelin
promotes food intake (acts on hypothalmic)
Bolus, Chyme
bolus- lump of food swallowed at one time
chyme- bolus processed by stomach
Pyloric sphincter, Ileocecal valve
pyloric- stomach to small intestine
ileocecal- small to large intestine
Function of s. intestine and what increases absorption
-95% absorption in duodenum+jejunum
Folds of Kerkring- increase by 3x
Villi- increase by 10x
brush border- increase by 20x
Functions of gallbladder
stores, releases bile
bile facilitates absorption of fat
functions of pancrease
secretes sodium bicarbonate as buffer
Gastrin
stims hcl prod in stomach
secretin
stims h2o and bicarbonate secreation in pancreatic juices
CCK
stims enzymes in pancreatic juices/ gallbladder contractions
GIP, GLP-1
inhibits gastric motility
Carb digestion steps(Enzymes)
mouth- a amylase
s intestine- pancreatic amylase, maltase, sucrase, lactase
monosaccarides enter capillaires and delivered to liver
Lipid digestion steps(enzymes)
mouth- lingual lipase
stomach- lingual lipase, gastric lipase
s intestine- bile, pancreatic amylase
-creates micelle which is absorbed by villi
FA + glycerol enter bloodstream bigger go I’m lympatic system
Pro digestion steps(enzymes)
Stomach- activates protease enzyme pepin
s intestine- absorb AA and transfered to liver
Where does most vitamin intake occur
jejumum+ ileum
what regulates Gastric emptying
contractions of stomach, nervous/horomone signals, acidity etc
