Why Does Fetal Hemoglobin Have a Greater Affinity for Oxygen

question 19

Multiple Choice

Why does fetal hemoglobin have a greater affinity for oxygen than adult hemoglobin?

• A)The fetus does not have its own oxygen supply and must rely on oxygen from the maternal vascular system.
• B)The fetus has two g-chains on the hemoglobin, rather than two b-chains as in the adult.
• C)Fetal hemoglobin interacts less readily with diphosphoglycerate (DPG), which inhibits hemoglobin-oxygen binding.
• D)Fetal hemoglobin production occurs in the vessels and liver rather than in the bone marrow as in the adult.

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