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Vitamins UAG
Vitamins deficiency
| Question | Answer |
|---|---|
| What is the active form of thiamine B1? | Thiamine Pyrophosphate (TPP) |
| List two conditions caused by a thiamine B1 deficiency | Beriberi and Wernicke-Korsakoff |
| Where is beriberi often found and why? | Asia because the thiamine rich grain husks are stripped off by the rice polishing process. |
| Thiamine is a cofactor of enzymes catalyzing which reactions? | pyruvate to acetyl CoA alpha ketoglutarate to succinyl CoA Ribose 5-P Xylulose 5-p to sedoheptulose 7-p + glyceraldehyde 3-p |
| TTP is a cofactor for which enzymes | Pyruvate dehydrogenase(glycolysis) Transketolase (HMP shunt) Alpha-ketoglutarate dehydrogenase (TCA) Branched chain AA dehydrogenase |
| Which lab finding indicates a thiamine deficiency? | Increase in erythrocyte transketolase activity upon addition of TPP |
| What causes Wernicke-Korsakoff syndrome in the US? | Chronic alcoholism causing dietary insufficiency or impaired intestinal absorption of Thiamine |
| List some nonalcoholic conditions associated with Wernicke's Encephalopathy? | Prolonged IV feeding, IV hyperalimentation, Hyperemesis gravidarum, Arexia nervosa, Prolonged fasting, Refeeding after starvation, Gastric plication |
| Signs and symptoms of Wernicke-Korsakoff | mystagmus, ataxia, memory disordrs, disorientation (chronic alcoholics) |
| Signs and symptoms of beriberi | Wet-cardiovascular (high-output cardiac failure, edema) Dry-CNS manifestations (polyneuritis) |
| What are the active forms of Riboflavin B2? | Flavin mononucleotide (FMN) Flavin adenine dinucleotide (FAD) |
| Signs and symptoms of riboflavin deficiency | 2Cs-Corneal vascularisatin and Cheilosis (inflammation of lips, scaling and fissures at the corner of the mouth) |
| Which process is affected by riboflavin deficiency? | Electron transport system, Oxydation and reduction of substrates. |
| What is the earliest sign of riboflavin deficiency? | Proliferation of the bulbar conjunctival capillaries |
| What are the |