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Please select the appropriate combination of the digested products in humans with their corresponding absorption site and mechanism.
Xylose and Potassium ions in the Large intestine and facilitated diffusion
Galactose and Calcium ions in the Small intestine and active transport
Sucrose and Magnesium ions Duodenum and endocytosis
Lactose and Iron in the Small intestine and passive diffusion
Answers (1)
Option 2 is correct. Galactose and calcium ions are absorbed in the small intestine through active transport, where carrier proteins require energy to move molecules against their concentration gradient. Xylose and potassium ions are also absorbed in the small intestine, with xylose utilizing facilitated diffusion and potassium ions being absorbed through various mechanisms such as passive diffusion and active transport. Sucrose and magnesium ions are primarily absorbed in the small intestine through secondary active transport and passive diffusion, not in the duodenum. Lactose is absorbed in the small intestine through active transport, while iron is primarily absorbed in the duodenum and proximal jejunum via active transport mechanisms.
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