Which Is a Benefit Provided by Fetal Hemoglobin

Multiple Choice

Which is a benefit provided by fetal hemoglobin?

A) It occurs in higher density in red blood cells than adult hemoglobin does.
B) It releases O₂ at a lower partial pressure than adult hemoglobin does.
C) In the placenta, O₂ diffuses from fetal hemoglobin to adult hemoglobin.
D) At low O₂ pressures, it is less likely to pick up oxygen than adult hemoglobin is.
E) It transfers O₂ from adult hemoglobin to the fetus.