Which of the Following Explains Why the First Baby Born

question 18

Multiple Choice

Which of the following explains why the first baby born to a RhD^- mother and a RhD⁺ father does not develop hemolytic disease of the newborn?

• A)Fetal erythrocytes do not cross the placenta and therefore do not stimulate an antibody response.
• B)The antibodies made by the RhD^- mother during the first pregnancy are predominantly IgM and have low affinity for the Rhesus antigen.
• C)Maternal macrophages in the placenta bind to anti-Rhesus antibodies and prevent their transfer to the fetus.
• D)Hemolytic disease of the newborn is a T-cell-mediated disease and maternal T cells do not cross the placenta during pregnancy.
• E)The Rhesus antigen is not immunogenic and does not stimulate an antibody response.

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Definitions:

Repetitive Routines

Behaviors or tasks that are performed in a consistent, unvarying manner, often as part of a daily or regular schedule.

Specific Phobia

An intense, irrational fear of a specific object, situation, or activity that is strongly avoided.

Extreme

Something that is far beyond the norm or average in magnitude, intensity, or degree.

Irrational Fear

A disproportionate and intense fear of an object, situation, or activity that poses little to no actual danger.