Digestion of Carbohydrates Flashcards
What is the least common saccharide in our diet?
Maltose
Where is maltose formed?
From digestion of starches
What is amylose?
A straight chain starch
What is amylopectin?
A branched starch
What is dietary fiber?
Nondigestible polysaccharides found in the cell wall
What bonds found in dietary fiber are we unable to digest?
beta-glycoside bonds
Is glycogen or amylopectin more branched?
Glycogen
What inactivates salivary amylase?
Gastric acid
Where are the majority of carbohydrates absorbed?
In the microvilli of the small intestine (brush border)
What carbohydrates need active transport to be absorbed?
Glucose
Galactose
What carbohydrate uses facilitated diffusion to be absorbed?
Fructose
How is glucose absorbed?
In the brush border of the SI by sodium-glucose cotransporter-1 (SGLT-1) (1 Na per glucose)
How are glucose, galactose and fructose absorbed into the basolateral membrane?
GLUT2 transporter
Where are carbohydrates digested?
Mouth: salivary amylase
Duodenum: pancreatic amylase
