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WorksheetsDigestion & Absorption of Carbohydrates
Total questions: 15
Worksheet time: 8mins
How are carbohydrates in foodstuffs broken down into simple sugars in the GI tract?
Which of the following are disorders of sugar hydrolysis and absorption?
Sucrose-isomaltase deficiency.
How do monosaccharides transport into blood circulation?
Priya is curious about how carbohydrates are broken down in the GIT after eating. Can you briefly explain the hydrolysis of carbohydrates to her?
Carbohydrates are converted into proteins and fats.
Carbohydrates are hydrolyzed into monosaccharides through enzymatic action.
What are the roles of insulin and glucagon in blood sugar homesotasis?
What are the polysaccharides involved in digestion?
Starch & glycogen
Sucrose, lactose, maltose
Fructose, pentose
What enzyme is responsible for the hydrolysis of starch in the mouth?
Ptyalin
Amylopsin
Lactase
Sucrase
What happens to carbohydrate digestion in the stomach?
Lingual amylase further break down the dextrin
Disaccharides hydrolysis may occurs
No carbohydrate splitting enzymes available
HCl may hydrolyzes the carbohydrates
What is the role of amylopsin (pancreatic amylase) in carbohydrate digestion?
It hydrolyzes α-1→4 glycosidic linkage
It cleaves lactose
It is inactive in the duodenum
It requires a low pH for activation
What is the primary site of monosaccharide absorption?
Duodenum
Upper jejunum
Distal ileum
Large intestine
Why lactose intolerances can occur?
exessive lactase production.
high intake of dairy products.
insufficient production of lactase.
vitamin D deficiency.
What is the consequence of disaccharidase deficiency?
Osmotic diarrhea
Increased glucose absorption
Decreased insulin secretion
Dehydration
What happens to excess glucose in the body?
Converted to fat
Stored as glycogen
Used for β oxidation
What are the intestinal enzymes involve in disaccharides digestion?
What is the action of ptyalin at random?
hydrolyzes α-1 → 4 glycosidic linkage
hydrolyzes α- 1 → 6 branched amylopectin
hydrolyzes β-1 → 4 glycosidic linkage
hydrolyzes β-1 → 1 glycosidic linkage
