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Human Metabolism Notes
Human Metabolism Notes
Vitamin Absorption
Minerals You need a very little amount of minerals in your body (trace amount). - Too much minerals will become toxic for you.
- For example, massive doses of zinc will kill you.
- Iron
- Primary source of iron is from meat (because meat has red blood cells which have heme groups on the hemoglobin)
- Iron goes from lumen to epithelial cell by ferratin. Ferratin is in the epithelial cell that binds with iron so it won’t escape to the lumen. Only 10% of the iron goes from cell to the capillary. In the capillary, a protein called transferrin binds to iron. This protein takes it throughout the body, but more especially to the bone marrow to make hemoglobin.
- The 90% of the iron bound to ferratin goes out to the lumen.
- This means that the 90% of the iron goes to the fecal matter and eliminated.
- The iron levels in the lumen dictate how much ferratin is made in the epithelial cell.
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