Digestion in Small Intestine & Lactose Intolerance
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Questions and Answers

What is the absorbable form of carbohydrates in the gastrointestinal tract?

  • Polysaccharides
  • Cellulose
  • Monosaccharides (correct)
  • Disaccharides

    • Which of the following is NOT a monosaccharide?

  • Fructose
  • Pentose
  • Maltose (correct)
  • Glucose

    • What are the consequences of undernutrition discussed by Professor Hanan H.Fouad?

  • Marasmus, Cachexia, and Kwashiorkor (correct)
  • Anemia and Scurvy
  • Hypertension and Diabetes
  • Osteoporosis and Osteoarthritis

    • Which of the following substances is classified as a polysaccharide?

    <p>Glycogen</p> Signup and view all the answers

    What is the primary function of cellulose in the context of digestion?

    <p>Structural component</p> Signup and view all the answers

    How are all complex carbohydrates in the gastrointestinal tract converted for absorption?

    <p>To monosaccharides</p> Signup and view all the answers

    What is the main reason behind lactose intolerance?

    <p>Absence of lactase enzyme</p> Signup and view all the answers

    Where are the disaccharidases responsible for the hydrolysis of disaccharides located?

    <p>Brush border of intestinal mucosal cells</p> Signup and view all the answers

    What are the clinical manifestations of lactose intolerance?

    <p>Abdominal cramps</p> Signup and view all the answers

    What happens when undigested lactose in the intestinal lumen is acted upon by bacteria?

    <p>It is converted to CO2, H2, and various acids</p> Signup and view all the answers

    How do CO2 and H2 affect the digestive system in lactose intolerance?

    <p>They cause distensions and flatulence</p> Signup and view all the answers

    What treatment approach is recommended for lactose intolerance?

    <p>Feeding a lactose-free diet and avoiding lactose-rich foods</p> Signup and view all the answers

    Which organs are involved in the active uptake of glucose against concentration gradient?

    <p>Small intestine and kidney</p> Signup and view all the answers

    What is the clinical significance of the γ – glutamyl cycle?

    <p>Affects amino acids absorption</p> Signup and view all the answers

    Which symptoms are associated with Hartnup disease?

    <p>Skin rash and anxiety</p> Signup and view all the answers

    What type of disorder is Cystic Fibrosis (CF)?

    <p>Autosomal recessive</p> Signup and view all the answers

    What do defective genes cause in people with Cystic Fibrosis (CF)?

    <p>Sticky and thick secretions</p> Signup and view all the answers

    Which cells are affected by Cystic Fibrosis (CF)?

    <p>Cells producing mucus, sweat, and digestive juices</p> Signup and view all the answers

    Which enzyme is responsible for converting polysaccharides to disaccharides?

    <p>Salivary Amylase</p> Signup and view all the answers

    What is the role of disaccharidases in the digestion of carbohydrates?

    <p>Convert disaccharides to monosaccharides</p> Signup and view all the answers

    Why does carbohydrate digestion stop in the stomach?

    <p>Salivary amylase becomes inactive due to high acidity</p> Signup and view all the answers

    Which enzyme degrades dextrin further into maltose, isomaltose, and limit dextrin?

    <p>Pancreatic Amylase</p> Signup and view all the answers

    What stimulates the release of pancreatic juice during digestion in the duodenum?

    <p>Secretin &amp; cholecystokinin (CCK)</p> Signup and view all the answers

    What is the optimum pH for pancreatic α-amylase to function effectively?

    <p>7.1</p> Signup and view all the answers

    What is the main role of secretions in cystic fibrosis?

    <p>Blocking tubes, ducts, and passageways</p> Signup and view all the answers

    Which of the following is NOT a symptom of cystic fibrosis?

    <p>High body temperature</p> Signup and view all the answers

    What effect does gluten exposure have on people with celiac disease?

    <p>Damages the villi</p> Signup and view all the answers

    What is believed to be the causative factor of tropical sprue?

    <p>Bacterial infection</p> Signup and view all the answers

    What occurs as a result of the infection in tropical sprue?

    <p>Intestinal stasis</p> Signup and view all the answers

    Which of the following is a symptom of coeliac disease?

    <p>Nasal polyps</p> Signup and view all the answers

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