Why would an O/Rh-negative mother who gives birth to a baby who is B/Rh-positive be at less risk for developing anti-Rh antibodies than an O/Rh-negative mother who gives birth to an O/Rh-positive baby?
What will be an ideal response?
An Rh-negative mother may become sensitized to the Rh-positive antigen after delivering an Rh-positive child. This happens when the child's blood cells enter her circulation, and the Rh-positive antigen is sensed by the immune system and B cells begin to produce antibodies against it. If the child is type B, however, the mother will already have antibodies against that blood type and may remove the cells before her immune system can sense any additional foreign antigens.
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What are the primary chemical mediators released from mast cells during a type I hypersensitivity reaction?
A) antibodies B) interleukin I and tumor necrosis factor C) histamine and serotonin D) cytokines
A factor that lowers the likelihood of success when using IVF is
A) advanced maternal age. B) number of previous failed IVF attempts. C) increased time being infertile. D) All of these are correct.
The renal vein sends blood back to the heart via which vein?
a. iliac vein b. gastric vein c. inferior vena cava d. superior vena cava
Chemical reactions in which large molecules are built from small molecules are classified as ______ reactions. In contrast, ______ reactions involve breaking large molecules down into smaller ones.