Why Does Fetal Hemoglobin Have a Greater Affinity for Oxygen

question 39

Multiple Choice

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

• A) Because the fetus does not have its own oxygen supply and must reply on oxygen from the maternal vascular system
• B) Because the fetus has two-chains on the hemoglobin,rather than two ß-chains as in the adult
• C) Because fetal hemoglobin interacts less readily with 2,3 diphosphoglycerate (2,3 DP),which inhibits hemoglobin-oxygen binding
• D) Because fetal hemoglobin production occurs in the vessels and liver rather than in the bone marrow as in the adult

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