QuestionSBA
QuestionChoice
Iron is not absorbed in the stomach, but Fe3+ is converted to Fe2+ here. The proximal jejunum is where the absorption of iron occurs.
10023981
b
Stomach & proximal jejunum
QuestionChoice
This is an incorrect choice as the stomach is not a site for iron absorption.
10023983
d
Stomach & duodenum
QuestionChoice
At physiological pH, iron exists in the oxidised, ferric (Fe3+) state. To be absorbed, iron must be in the ferrous (Fe2+) state or bound by a protein such as heme. It is absorbed in the duodenum and proximal jejunum.
10023980
a
Duodenum & proximal jejunum
QuestionChoice
The colon is primarily responsible for water and electrolyte absorption, but it is not involved in the absorption of iron. The anus is the endpoint of the GI tract and is not involved in the absorption of nutrients.
10023984
e
Colon & anus
QuestionChoice
The distal jejunum is responsible for small absorption of B12, water and sodium. Larger amounts of these are absorbed in the ileum.
10023982
c
Distal jejunum & ileum
Concept
Chapter
2693
5711
Iron Metabolism
Topic
180
Biochemistry
17194
With regards to the metabolism of iron, where is iron absorbed in the GI tract?
a