Reisei
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#1
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My textbook says different things.. For glucose it says sodium is actively pumped into the blood to create a concentration gradient to diffuse from the ileum into the epithelial cells. For amino acids, it says sodium is actively pumped into the ileum from epithelial cells so that it re-diffuses back into the epithelial cells, carrying the amino acids with it. Are there two distinct methods of transporting glucose and amino acids, or is one of them wrong? Which way is sodium actively transported?
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Silverquill
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My notes said that they happen the same way :/ im confused now
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Bertybassett
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(Original post by Silverquill)
My notes said that they happen the same way :/ im confused now
same. this topic always confuses me as there's different content everywhere.
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Reisei
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(Original post by Silverquill)
My notes said that they happen the same way :/ im confused now
My notes did too but then I re-read my textbook and it's slightly different, not sure if one is wrong
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jazz_xox_
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If you're on AQA, I believe you only need to know the full process of the sodium-glucose co-transport, which you have rightly stated- and you just need to know that amino acids are also absorbed by co-transport, but I don't think you'd be expected to talk about this in detail. It's likely that they are slightly different, but my text book doesn't go into detail about this either.
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jazz_xox_
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Actually, I think what I've told you is wrong.. the spec does say:

Mechanisms for the absorption of the products of digestion by cells lining the ileum of mammals, to include: • co-transport mechanisms for the absorption of amino acids and of monosaccharides • the role of micelles in the absorption of lipids.

My text book agrees with your first post that the Na+ is transported into the ileum for amino acids, rather than into the blood. so I'd stick with that
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