What of the following influence the oxygen transfer from maternal to fetal blood?
I. Maternal-fetal PO₂ gradient
II. Higher hemoglobin concentration in fetal blood
III. Lower affinity of HbF for oxygen

Question

Quizplus · Accepted Answer

I. The maternal-fetal partial pressure gradient of oxygen (PO2) is crucial for oxygen transfer from the mother to the fetus. A higher PO2 in maternal blood compared to fetal blood drives the diffusion of oxygen across the placenta.II. Fetal blood has a higher hemoglobin concentration than maternal blood, which allows it to carry more oxygen per unit volume. This adaptation helps the fetus obtain sufficient oxygen from the maternal blood.III. Fetal hemoglobin (HbF) actually has a higher affinity for oxygen than adult hemoglobin (HbA), not lower. This higher affinity allows HbF to effectively extract oxygen from maternal blood, where the oxygen is bound to HbA with lower affinity.

What of the Following Influence the Oxygen Transfer from Maternal