L11 Online Flashcards
Digestion and absorption using
brush border ectoenzymes
Sugar transporters
SGLT1: glucose, galactose into cell
GLUT5: Fructose into cell
GLUT2: Glucose, galactose, fructose into blood
Protein break down in
stomach (pepsinogen/pepsin) small intestine (trypsinogen/trypsin)
Proenzymes for protein cleavage in small intestine
Trypsinogen–Trypsin
Chymotrypsinogen–chymotrypsin
Proelastase–elastase
Procarboxypeptidase A, B–carboxy…
Types of amino acid transports
Sodium dependent
Sodium independent
Sources of lipase
Lingual
Gastric
Pancreatic
Triglyceride converted into
Monoglyceride
2 fatty acids
Most fatty acid absorption occurs in
duodenum
How does lipase interact with fat
Colipase
B12 receptors
Specific for intrinsic factor (all other water vitamins have their own channel)
Fat soluble vitamins are located in
Chylomicrons
Most water absorption occurs in
Small intestine
pH and Ca
Calcium forms salts at neutal pH so must bind to calbindin or vesicle in cell
