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23 Cards in this Set
- Front
- Back
Where are fat soluble vitamins absorbed?
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Ileum
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B-complex deficiencies result in these 3 findings:
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Dermatitis
Glossitis Diarrhea |
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This form of vitamin A is used for wrinkles and acne:
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Retin-A
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Signs of Vitamin A excess:
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HA, incr ICP
Skin changes, alopecia, sore throat Athralgias, Fatigue hepatitis |
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Thiamine is used as a cofactor in two places.
Name them: |
Common cofactor for:
1. Decarboxylation of a-keto acids (pyruvate, alpha-ketogluterate) 2. transketolase (HMP shunt) |
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Thiamine is specifically used in which step of the TCA cycle
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decarboxylation of a-keto glutarate to succinyl CoA.
(also requires lipoic acid, CoA, FAD, and NAD) ** It is b/c of this rxn that you must give thiamine before glucose! ** |
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Signs of DRY beri beri:
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Polyneruritis, Muscle wasting
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Manifestations of Vitamin B2 deficiency:
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Angular stomatitis
Chelosis Corneal vascularization (may see photophobia) |
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Biological role of Vitamin B2 (riboflavin)
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Cofactor in oxidation and reduction
Think FAD and FMN |
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Two metabolic diseases associated with Niacin deficiency:
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Hartnups (impaired transport of tryptophan in intestine)
Blue diaper syndrome (impaired transport of tryptophan in kidney) |
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When you think niacin deficiency, you should also think about ____ deficiency.
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Vitamin B6 (pyridoxine)
(Niacin is derived from tryptophan using vitamin B6 as a cofactor) |
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Signs/Symptoms of B5 (Pantothenate) deficiency:
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Dermatitis, alopecia;
enteritis; adrenal insufficiency (decrease sterol synth) |
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Which vitamin is a co-factor for CoA and fatty acid synthase?
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B5 (pantothenate)
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Symptoms of B6 deficiency:
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Convulsions, hyperirritability;
peripheral neuropathy |
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Which vitamin is used in transamination reactions:
What are these reactions used for? |
B6
Used for decarboxylation and heme synthesis |
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Test for thiamine defiency:
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Erythrocyte transketolase
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Signs/symptoms with B12 deficiency?
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Neurological symptoms (optic neuropathy, subacute combined degeneration, paresthesia)
Glossitis Macrocytic, megaloblastic anemia |
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Which vitamin is a cofactor for homocysteine methylation?
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B12
Homocysteine + N-metTHF -> Methionine + THF & Methylmalonyl-Coa->Succinyl Coa |
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Biotin is a co-factor in what general types of rxns?
Name 3 specific ones. |
Carboxylations:
1) Pyruvate --> oxaloacetate 2) Acetyl-CoA --> malonyl-CoA 3) Propionyl-CoA --> methymalonyl-CoA |
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Which vitamin is a cofactor in the conversion of DA--> NE?
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Vitamin C
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Which form of vitamin D is consumed in milk?
Ergocalciferol Cholecalciferol |
Ergocalciferol
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Which disease does Vitamin E deficiency most resemble?
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Fredrich's Ataxia
(Demyelination of dorsal columns, lateral corticospinal tract, and spinocerebellar tract) + hemolytic anemia |
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Cofactor needed for cystathionine synthase:
(homocysteine --> cystathionine) |
B6
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