Question

which of the following processes occurs in the first stage of iron deficiency?
o a. iron stores diminish.
o b. serum ferritin decreases.
o c. erythrocyte protoporphyrin accumulates.
o d. erythrocyte protoporphyrin declines.

Explanation:

In the first stage of iron deficiency (iron depletion), the body's iron stores (like ferritin in cells) start to diminish. Serum ferritin decrease is a later stage marker. Erythrocyte protoporphyrin accumulation happens in later stages of iron - deficient erythropoiesis, and it does not decline. So the process in the first stage is iron stores diminishing.

Answer:

a. Iron stores diminish.