What is the role of duodenal cytochrome b in the regulation of iron absorption in the context of anemia?

A It increases iron absorption by reducing ferric iron to ferrous iron ✓
B It decreases iron absorption by oxidizing ferrous iron to ferric iron
C It has no role in iron absorption
D It regulates iron absorption by binding to transferrin

Explanation

Duodenal cytochrome b (DCYTB) is an enzyme that reduces ferric iron to ferrous iron, which is then absorbed by the enterocytes. This process is crucial for maintaining iron homeostasis, especially in individuals with anemia.

Source

Scientific literature on iron metabolism
Hematology Hematology: Anemia Hematology: Anemia Hard MEDICAL Confidence: high