The Reason for Fetal Globin Chain Switching Is That

question 40

Multiple Choice

The reason for fetal globin chain switching is that

• A) a fetus does not need oxygen but a newborn does.
• B) a fetus has four alpha globin chains and a newborn has four beta globin chains.
• C) a fetus' blood is clear until the sixth month, and then globin chains turn it red.
• D) the newborn needs more iron than the fetus or embryo.
• E) the embryo and fetus receive different concentrations of oxygen compared to after birth.

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