Recent content by Aymeric

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    Lactic acidosis: how is it possible?

    Hello, Many diseases are characterized by the presence of lactic acidosis, with lowered blood pH supposedly due to lactate (as in diabetes for example). My question is: how is it possible, since lactate coming out of the lactate dehydrogenase from pyruvate is... lactate, not lactic acid. So how...
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    Contribution of Krebs to oxydative phosphorylation?

    Hello, After going over my biochemistry chapter on glycolysis, the TCA cycle and the electron transport chain, it seems to me like the only role that Krebs plays (in the context of ATP generation I mean) is to produce enough H+ and electrons to fuel the electron transport chain mechanism. Is...
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    Are there more sounds than we can produce?

    I've studied Chinese for 5 years, and they do have L sounds. The problem as it were is with the English L, not the Chinese L. Of course, if you are a native speaker of English, you might not realize that, but the English L is a particular kind of L, it is 'dark' unlike in Chinese and many...
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    When does gluconeogenesis kick in during physical activity?

    Hello, I'm a dietetics student, and my course is really unclear about gluconeogenesis regulation, and exactly WHEN it happens. What my coursebook teaches me is that glycogenolysis is the main purveyor of energy during physical exercise, and it is triggered by LOW INSULIN, HIGH GLUCAGON and...
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    BMR and adaptive thermogenesis: what's the 'norm'?

    Hello, I've often read that average BMR can decrease as a result of a restrictive diet, in a process known as adaptive thermogenesis. What I haven't been able to find out though, is how exactly the body manages to 'use fewer nutrients' for the same tasks. Are sacrifices made anywhere? Are...
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    Is Blood Glucose Increase Directly Proportional to Quantity x GI?

    Many thanks for taking the time to post! However this doesn't answer my question, probably because I wasn't clear enough. I know what GI and GL are and how they are calculated. What I wanted to know is whether it has been established that glucose absorption is constant and unlimited, as...
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    Is Blood Glucose Increase Directly Proportional to Quantity x GI?

    Hello, From what I have read, the glycemic index is a limited tool because it doesn't take the amount of ingested carbs into account, hence why the glycemic load was created. But then I read an example that threw me: a serving of 10g with an GI of 100 is equivalent to a serving of 100 g with a...
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    Is a proton a hydrogen cation and vice versa?

    Thanks!
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    Is a proton a hydrogen cation and vice versa?

    Hello, I was wondering if it could be said that any proton can be identified as a hydrogen cation, and any hydrogen cation as a proton. Thanks.
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    Ribose cyclization: pyrane or furane?

    Hello, My biochemistry textbook tells me that ribose and fructose give furanes. I had trouble wrapping my head around the cyclization process so I looked for other explanations and I found this one: http://web.campbell.edu/faculty/nemecz/323_lect/sugars/cyclization.html It seems to say...
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    Why are sugars found predominantly in D-form in biochemistry?

    Thanks everyone for your answers! It's very interesting...
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    Why are sugars found predominantly in D-form in biochemistry?

    Hello, My question is in the title :) I have just started working on my biochemistry course, and the textbook says that 'all sugars found in food and in the body are in D-form (the L-form can be found in rare cases in some plants and micro-organisms)'. But it doesn't explain why or how...
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