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Pathology Iron deficiency anemia 0269247b

The pathogenesis of hypochromic anemia in lead poisoning is due to -

A
Lead blocks transferrin receptors of erythroid precursors
B
Binding of lead to transferrin, inhibiting the transpo of iron
C
Inhibition of enzymes involved in heme biosynthesis
D
Inhibiting breakdown of ferritin into hemosiderin
High-Yield Explanation
Iron should be combined with protoporphyrin to synthesize Heme. To synthesize protoporphyrin and combine it with iron, enzymes like ALA synthase, ALA dehydratase & Ferrochelatase are required. Lead inhibits heme synthesis by inhibiting enzymes ALA dehydratase & Ferrochelatase resulting in microcytic hypochromic anemia.

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