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Old 09-19-2012
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Default Dietary intolerance in a child - what common intermediate upon metabolism?

A mother brings her 2-year-old son into the clinic. She says that he has diarrhea and is gassy fairly often. Upon further questioning, the mother states that he has had no fevers, chills, or vomiting. She has not noticed any blood in his stools, and she cannot remember if he ate food that may have been contaminated. However, she says that the diarrhea most often comes after he has had milk or cheese. The physician suspects a certain disease, and he gives the patient a list of foods consisting of various carbohydrates, proteins, and fats that should not trigger these symptoms. Although these nutrients come from very different sources, which would be seen as common intermediates upon metabolism of the foods?

a) Alanine
b) Cholesterol
c) Lactate
d) Pyruvate
e) Ribose-5-phosphate
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Old 09-19-2012
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i'll go with D) pyruvate
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Default ?CC..lactose intollerance

A mother brings her 2-year-old son into the clinic. She says that he has diarrhea and is gassy fairly often. Upon further questioning, the mother states that he has had no fevers, chills, or vomiting. She has not noticed any blood in his stools, and she cannot remember if he ate food that may have been contaminated. However, she says that the diarrhea most often comes after he has had milk or cheese. The physician suspects a certain disease, and he gives the patient a list of foods consisting of various carbohydrates, proteins, and fats that should not trigger these symptoms. Although these nutrients come from very different sources, which would be seen as common intermediates upon metabolism of the foods?

a) Alanine
b) Cholesterol
c) Lactate ??
d) Pyruvate
e) Ribose-5-phosphate
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Pyruvate????
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Quote:
Originally Posted by Casandra View Post
A mother brings her 2-year-old son into the clinic. She says that he has diarrhea and is gassy fairly often. Upon further questioning, the mother states that he has had no fevers, chills, or vomiting. She has not noticed any blood in his stools, and she cannot remember if he ate food that may have been contaminated. However, she says that the diarrhea most often comes after he has had milk or cheese. The physician suspects a certain disease, and he gives the patient a list of foods consisting of various carbohydrates, proteins, and fats that should not trigger these symptoms. Although these nutrients come from very different sources, which would be seen as common intermediates upon metabolism of the foods?

a) Alanine
b) Cholesterol
c) Lactate
d) Pyruvate
e) Ribose-5-phosphate
I will go for D.pyruvate..
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D-pyruvate
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A mother brings her 2-year-old son into the clinic. She says that he has diarrhea and is gassy fairly often. Upon further questioning, the mother states that he has had no fevers, chills, or vomiting. She has not noticed any blood in his stools, and she cannot remember if he ate food that may have been contaminated. However, she says that the diarrhea most often comes after he has had milk or cheese. The physician suspects a certain disease, and he gives the patient a list of foods consisting of various carbohydrates, proteins, and fats that should not trigger these symptoms. Although these nutrients come from very different sources, which would be seen as common intermediates upon metabolism of the foods?

a) Alanine
b) Cholesterol
c) Lactate
d) Pyruvate
e) Ribose-5-phosphate
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Old 09-19-2012
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Default correct answer :)

The answer is d) Pyruvate

The boy has lactose intolerance. He lacks the lactase enzyme, which degrades lactose into galactose and glucose. A deficiency in lactase results in gastrointestinal complaints such as excessive gas production and frequent diarrhea. Either the boy will eventually produce lactase (in which case he would not have the problems), or he will not produce lactase and will have to make a permanent adjustment to his diet. Until then, the diet his physician gives him should consist of restricted carbohydrates, with fewer restrictions on fats and proteins. When these nutrients are eaten, digestion starts to break them down so they can be absorbed into the bloodstream. They will enter different cells from the blood for further catabolism. Catabolism yields many compounds, and pyruvate is one of the common ones produced from different entry points of carbohydrates, proteins, or fats.
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