Question

Fetal hemoglobin 

A. Is the only type identifiable in fetal blood. 

B. Forms the bulk of total hemoglobin for the first year of life. 

C. Has a higher oxygen-carrying capacity than adult hemoglobin. 

D. Binds 2,3-DPI more avidly than does adult hemoglobin. 

E. Has a higher affinity than the adult form for oxygen at low P_O2.

Answer 1

A. False The adult type appears around mid gestation. 

B. False It has almost disappeared by four months. 

C. False They have similar oxygen capacities. 

D. False It binds it less readily. 

E. True This aids oxygen transfer in the placenta.