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23 Cards in this Set

  • Front
  • Back
Where are fat soluble vitamins absorbed?
Ileum
B-complex deficiencies result in these 3 findings:
Dermatitis
Glossitis
Diarrhea
This form of vitamin A is used for wrinkles and acne:
Retin-A
Signs of Vitamin A excess:
HA, incr ICP
Skin changes, alopecia, sore throat
Athralgias, Fatigue
hepatitis
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)
Thiamine is specifically used in which step of the TCA cycle
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! **
Signs of DRY beri beri:
Polyneruritis, Muscle wasting
Manifestations of Vitamin B2 deficiency:
Angular stomatitis
Chelosis
Corneal vascularization (may see photophobia)
Biological role of Vitamin B2 (riboflavin)
Cofactor in oxidation and reduction

Think FAD and FMN
Two metabolic diseases associated with Niacin deficiency:
Hartnups (impaired transport of tryptophan in intestine)

Blue diaper syndrome (impaired transport of tryptophan in kidney)
When you think niacin deficiency, you should also think about ____ deficiency.
Vitamin B6 (pyridoxine)

(Niacin is derived from tryptophan using vitamin B6 as a cofactor)
Signs/Symptoms of B5 (Pantothenate) deficiency:
Dermatitis, alopecia;
enteritis;
adrenal insufficiency (decrease sterol synth)
Which vitamin is a co-factor for CoA and fatty acid synthase?
B5 (pantothenate)
Symptoms of B6 deficiency:
Convulsions, hyperirritability;
peripheral neuropathy
Which vitamin is used in transamination reactions:

What are these reactions used for?
B6

Used for decarboxylation and heme synthesis
Test for thiamine defiency:
Erythrocyte transketolase
Signs/symptoms with B12 deficiency?
Neurological symptoms (optic neuropathy, subacute combined degeneration, paresthesia)
Glossitis
Macrocytic, megaloblastic anemia
Which vitamin is a cofactor for homocysteine methylation?
B12

Homocysteine + N-metTHF -> Methionine + THF & Methylmalonyl-Coa->Succinyl Coa
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
Which vitamin is a cofactor in the conversion of DA--> NE?
Vitamin C
Which form of vitamin D is consumed in milk?

Ergocalciferol
Cholecalciferol
Ergocalciferol
Which disease does Vitamin E deficiency most resemble?
Fredrich's Ataxia
(Demyelination of dorsal columns, lateral corticospinal tract, and spinocerebellar tract)

+ hemolytic anemia
Cofactor needed for cystathionine synthase:

(homocysteine --> cystathionine)
B6