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 PO₂ gradient is crucial for oxygen transfer from the mother to the fetus. A higher partial pressure of oxygen 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, facilitating efficient oxygen transfer. 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, which is not mentioned as a correct influence in the question's context.

What of the Following Influence the Oxygen Transfer from Maternal