Absorption mechanisms Practice Questions
40 free Absorption mechanisms practice questions for the Physiology, each with the correct answer and a detailed explanation. Open any question below, or take the full set as an interactive quiz.
Questions
40 questions
All Absorption mechanisms questions
- Q1. Which mechanism is primarily responsible for glucose absorption in the small intestine?
- Q2. Which part of the gastrointestinal tract is the major site for nutrient absorption?
- Q3. Fructose is absorbed from the intestine mainly by:
- Q4. Which form of protein digestion product is absorbed most efficiently?
- Q5. Which mechanism is responsible for fat absorption from the intestine?
- Q6. Which vitamin is absorbed along with dietary fats?
- Q7. Absorption of vitamin B12 requires which factor?
- Q8. Which mineral is absorbed primarily in the duodenum?
- Q9. Which transporter is responsible for sodium absorption in the intestine?
- Q10. Water absorption in the intestine occurs mainly by:
- Q11. Which carbohydrate digestion product is absorbed via facilitated diffusion?
- Q12. Which structure increases the absorptive surface area of the small intestine the most?
- Q13. Which mechanism is responsible for calcium absorption in the intestine?
- Q14. Which fatty acid absorption pathway leads to chylomicron formation?
- Q15. Which amino acid transport mechanism is sodium-dependent?
- Q16. Which vitamin is absorbed by simple diffusion?
- Q17. Which segment of the intestine absorbs bile salts?
- Q18. Which absorption mechanism explains oral rehydration therapy effectiveness?
- Q19. Which nutrient absorption is impaired in celiac disease?
- Q20. Which transport protein moves absorbed glucose into portal circulation?
- Q21. Which of the following transporters is responsible for the uptake of glucose and galactose across the apical membrane of the enterocyte against their concentra…
- Q22. Fructose is absorbed from the intestinal lumen into the enterocyte via which specific mechanism?
- Q23. How do short-chain and medium-chain fatty acids (fewer than 12 carbons) typically enter the systemic circulation?
- Q24. The absorption of most dietary lipids occurs in the small intestine. After entering the enterocyte, long-chain fatty acids and monoglycerides are re-esterified…
- Q25. Which mechanism best explains the absorption of Vitamin B12 (Cobalamin) in the terminal ileum?
- Q26. Oral rehydration therapy (ORT) is highly effective for treating secretory diarrhea because it exploits which physiological principle?
- Q27. Iron is absorbed in the duodenum primarily in the ferrous ($Fe^{2+}$) state. Which protein is responsible for the export of iron across the basolateral membran…
- Q28. Which transport protein is the primary mediator for the absorption of dipeptides and tripeptides in the small intestine?
- Q29. Calcium absorption is regulated by 1,25-dihydroxyvitamin D3. What is the role of calbindin in this process?
- Q30. Bile salts are essential for lipid digestion, but they are not absorbed with the fats in the upper small intestine. Where and how are they primarily recovered?
- Q31. The 'solvent drag' mechanism contributes significantly to the absorption of which of the following?
- Q32. Which form of dietary folate is the most common, and how is it modified prior to absorption?
- Q33. In the colon, short-chain fatty acids (SCFAs) like butyrate are produced by bacterial fermentation. How are they primarily absorbed?
- Q34. Water absorption in the small intestine is 'isostatic.' This means that:
- Q35. Which of the following describes the correct path of a glucose molecule from the intestinal lumen to the blood?
- Q36. A patient with a resection of the distal 50 cm of the ileum is most likely to develop which of the following conditions?
- Q37. Which intestinal structure provides the greatest increase in surface area for absorption?
- Q38. Absorption of which electrolyte is significantly increased by the action of aldosterone in the distal colon?
- Q39. Zollinger-Ellison syndrome (excess gastrin) causes steatorrhea (fatty stools) primarily because:
- Q40. Medium-chain triglycerides (MCTs) are often used in clinical nutrition for patients with malabsorption because: