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Questions and Answers
Where does absorption of ascorbic acid (Vitamin C) primarily occur?
Where does absorption of ascorbic acid (Vitamin C) primarily occur?
- Entire small intestine (correct)
- Entire large intestine
- Rectum
- Stomach
Which vitamin is primarily absorbed through receptor-mediated endocytosis in the distal ileum?
Which vitamin is primarily absorbed through receptor-mediated endocytosis in the distal ileum?
- Vitamin B12 (correct)
- Vitamin B5
- Vitamin B9
- Vitamin B6
How is niacin (Vitamin B3) primarily absorbed in the small intestine?
How is niacin (Vitamin B3) primarily absorbed in the small intestine?
- Carrier-mediated (correct)
- SVCT transport mechanism
- Receptor-mediated endocytosis
- Diffusion
What is the mechanism of absorption for biotin (Vitamin B7) in the intestines?
What is the mechanism of absorption for biotin (Vitamin B7) in the intestines?
In which part of the GI tract do muscle cells act as a conveyor belt to move contents in the proper direction?
In which part of the GI tract do muscle cells act as a conveyor belt to move contents in the proper direction?
What happens to iron absorption when less iron binds to ferritin?
What happens to iron absorption when less iron binds to ferritin?
Which region of the intestine is the most permeable in terms of paracellular permeability?
Which region of the intestine is the most permeable in terms of paracellular permeability?
What is the main reason for the flow of fluids mainly from blood to lumen in the small intestine?
What is the main reason for the flow of fluids mainly from blood to lumen in the small intestine?
Which lipoprotein is formed as a result of lipid digestion and reprocessing within enterocytes?
Which lipoprotein is formed as a result of lipid digestion and reprocessing within enterocytes?
What role does bile play in the digestion of dietary fats?
What role does bile play in the digestion of dietary fats?
In which layer do lipids cross before entering the cytosol during the process of lipid absorption?
In which layer do lipids cross before entering the cytosol during the process of lipid absorption?
Which ion is more abundantly transported in distal regions of the intestine?
Which ion is more abundantly transported in distal regions of the intestine?
What is the primary role of lipase and colipase in lipid digestion?
What is the primary role of lipase and colipase in lipid digestion?
What is the function of cholesterol esterase in lipid digestion?
What is the function of cholesterol esterase in lipid digestion?
What is the primary function of micelles in lipid absorption?
What is the primary function of micelles in lipid absorption?
What is the role of fatty acid binding proteins (FABP) in the cytosolic reprocessing of lipids?
What is the role of fatty acid binding proteins (FABP) in the cytosolic reprocessing of lipids?
What is the final step in the absorption of lipids across the intestinal epithelium?
What is the final step in the absorption of lipids across the intestinal epithelium?
What is the role of phospholipase A-2 in lipid digestion?
What is the role of phospholipase A-2 in lipid digestion?
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