Mechanism of Absorption in the Small Intestine
Form of Epithelial Cells
Digestion of Carbohydrates
Starch and glycogen broken down by amylase into maltose, sucrose and Lactose.
These molecules are then broken down further by enzymes Maltase, Sucrase and Lactase into glucose galactose and fructose
Glucose and Galactose transport (apical)
Glucose and galactose transport (Basolateral)
Monomers travel out basolateral membrane through GLUT2 through facilitated diffusion
Fructose passes through apical membrane through GLUT5 and out a GLUT2.
Monomers then enter capillaries through simple diffusion
Proteins and Peptides digestion
Absorption of di/tripeptides and free amino acids
Absorption of small peptides
Small peptides are absorbed and transported by transcytosis, a combination of endocytosis, vesicular transport and exocytosis
Proscess of Digestion of Fats
Process of absorption of fats
Vitamins, minerals, water and ions
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Public - 4/14/16, 5:10 PM