Which of the following types of hemoglobin has a higher affinity for oxygen at low pH levels?

A Hemoglobin A
B Hemoglobin F ✓
C Hemoglobin S
D Hemoglobin C

Explanation

Fetal hemoglobin (Hemoglobin F) has a higher affinity for oxygen than adult hemoglobin (Hemoglobin A), which allows it to effectively extract oxygen from the mother's bloodstream. Additionally, Hemoglobin F has a lower affinity for 2,3-BPG, which allows it to maintain its high affinity for oxygen even at low pH levels.

Source

Berne and Levy Physiology
Hematology Hematology: Hemoglobin and Oxygen Transport Hematology: Hemoglobin and Oxygen Transport Hard MEDICAL Confidence: medium