Fetal Hemoglobin Has a Greater Affinity for Oxygen Than Adult

question 15

Multiple Choice

Fetal hemoglobin has a greater affinity for oxygen than adult hemoglobin because:

• 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 γ-chains on the hemoglobin, rather than two ß-chains as in the adult.
• C)fetal hemoglobin interacts less readily with 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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