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Trace minerals
(Fe, Cu, Zn)
46
Nutrition
Undergraduate 4
04/15/2014

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Cards

Term
Essential Minerals
Definition

Selenium

iodine

chromium

molbdenum

manganese

iron

copper

zinc

Term
Non-essential minerals
Definition
Fluoride
Term
The most extensively studied mineral
Definition
iron
Term
Trace mineral amount (mg/day)
Definition
100
Term
Ultra trace mineral amount (mg/day)
Definition
1
Term
Forms of Iron
Definition
heme (Fe2+/reduced) and non-heme (mostly Fe3+/oxidized)
Term
Heme sources
Definition

Primarily animals foods cept dairy

it is embeded in a porphyrin ring

Term
non-heme sources
Definition

plants

enriched foods and supplements

from iron pots while cooking

Term
4 iron rich food groups
Definition

meats and seafood

grains and legumes

fruit

vegetables

Term
heme absorption
Definition
...... absorbed across the brush border membrane by a heme carrier protein. once inside the heme degrades and the iron is released.
Term
non-heme absorption
Definition

1. ____ is reduced by HCL in the stomach and enzymes in the duodenum

2. ____  is absorbed through the brush border membrane by DMT1 protein

3. binds to a cytosolic protein and does 1 of 3 things.

a.perform cell function

b. stored as ferritin

c. leaves cell via ferroportin

4. Ferroportin transports ____ out and Hephaestin oxidizes it so it can be transported in the blood via tranferrin.

Term
Fe functions
Definition

oxygen delivery

cofactor

antioxidant

Term
Fe storage
Definition

ferritin

hemosiderin (liver only when ferritin reaches capacity)

Term
most common deficiency
Definition
fe
Term
causes of fe deficiency
Definition

poor diet

poor absorption

blood loss

genetics

 

Term
high risk groups for fe deficiency
Definition
kids up to teens and females
Term
signs of fe deficiency
Definition

koilonychia (spoon shaped nails)

 

Term
Early stages without anemia
Definition

 

deficiency where fe iron containing proteins and ferritin are low, but hemoglobin and hematocrit levels are normal.

Term
iron deficiency with anemia
Definition
low hemoglobin, hematocrit, ferritin, iron containing proteins.
Term
fe deficiencies
Definition

early stages wlo anemia

irondeficiency with anemia

microcytic anemia

low rbc

Term
treatment for fe deficiencies
Definition

more heme iron, nonheme iron, vitamin c.

increase consumption of things that enhance absorption.

Term
enhance fe absorption
Definition

acids

MFP (meat, fish, poultry)

Term
inhibits fe absorption
Definition

phytate

tannins

polyphenols

calcium

Term
fe toxicity causes....
Definition
hemochromatosis
Term
hemochromatosis.....what is it and whats the treatment?
Definition

accumulation of iron due to defect in protein that absorbs iron= damage to tissues.

 

reduce iron intake

phlebotomy

medication to increase urinary excretion of fe.

Term
Zinc functions
Definition

cofactor

Matrix metalloprotein

antioxidant

gene expression

Term
Zinc sources
Definition

most food groups

meat

dairy

grain

seafood

Term
Zn is absorbed better from......
Definition

animal foods

20-30%

Term
Zn absorption...
Definition

1. through the brush border membrane by ZIP4.

2. inside enterocyte, if in excess, binds to metallothionein

3. through basolateral membrane by ZnT1

4. through the body with albumin

Term
Zinc deficiency
Definition

acrodermatitis enteropathica

no name=poor wound healing

Term
Acrodermatitis enteropathica..signs and treatment.
Definition

dermatitis

diarrhea

growth failure

 

pharmacologic zn doses (paracellular absorption=absorption between cells)

Term
enhances Zn absorption
Definition

slight aciditiy

amino acids (his, cys with thiols -SH)

Term
inhibits zn absorption
Definition

alkalinity

polyphenols and tannins

oxalates

calcium and iron

Term
Toxicity signs of zn
Definition
anosomia (loss of smell)
Term
Copper sources
Definition
most food groups
Term
Cu forms...
Definition

cupric/oxidized state (cu2+)

reduced (cu+)

Term
Cu absborption
Definition

1. must be reduced.

2. Ctr1 transports reduced ___ into intestinal cells.

3. ATP7A moves cu to blood.

4. albumin transports it in the blood.

Term
cu functions
Definition

oxidize iron with hepaestin and ceruloplasmin.

cofactor

collagen strength (bone, blood vessel)

Term
ATP7A defect
Definition

Menkes disease

aka Menkes kinky hair syndrome

Term
ZIP4 defect
Definition
acrodermatitis enteropathica
Term
Copper deficiency
Definition

Menkes disease

no name=collagen prob (aortia rupture)

Term
menkes disease
Definition
cu is trapped in intestinal cells
Term
copper excretion
Definition
during high levels of ___ATP7B will excrete ___into the bile to be excreted through feces.
Term
cu toxicity
Definition

wilsons disease

kayser fleischer rings

Term
Wilsons disease
Definition
mutation of ATP7B protein=no transport of __when levels are high=excess
Term
cu toxicity treatments
Definition

__ restricted diet

medication=penicillamine=inc urinary excretion of __

zn supplements

mo supplements (inc excretion)

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