3 Questions
What is the average daily iron intake and how much of it is absorbed by the body?
20mg, 3-6%
Which of the following factors affect iron absorption in the body?
Phytic acid, phosphates, and oxalates in cereals
What is the role of Fe3 reductase activity in iron absorption?
It is associated with the iron transporter in the brush borders of the enterocytes
Study Notes
- Iron losses in adults are relatively small and unregulated.
- Total body stores of iron are regulated by changes in absorption from the intestine.
- Men lose about 0.6mg/d of iron and women lose twice this value due to menstruation.
- Average daily iron intake is about 20mg but only 3-6% is absorbed.
- Phytic acid, phosphates, and oxalates in cereals form insoluble compounds with iron in the intestine.
- Most iron in the diet is in the ferric form, but it needs to be in the ferrous form for absorption.
- Fe3 reductase activity is associated with the iron transporter in the brush borders of the enterocytes.
- Gastric secretions dissolve iron and permit it to form soluble complexes with ascorbic acid and other substances.
- Iron absorption is affected by dietary factors.
- The text provides information on iron and its absorption in the body.
Test your knowledge on iron absorption with this informative quiz! Discover the role of iron in the body, how it's regulated, and factors that affect its absorption. From the importance of gastric secretions to the impact of dietary factors, this quiz covers it all. Sharpen your understanding of iron absorption with this engaging quiz.
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