Which of the following situations could result in maternal antibodies attacking fetal blood cells during a second pregnancy?
Mom is Rh-positive and the fetus is Rh-positive
Mom is Rh-negative and fetus is Rh-positive
Mom is Rh-negative and fetus is Rh-negative
Mom is Rh-positive and fetus is Rh-negative
The Correct Answer is B
a) Mom is Rh-positive and the fetus is Rh-positive: No issue arises because the mother's immune system recognizes the Rh antigen as self.
b) Mom is Rh-negative and fetus is Rh-positive: If the mother is Rh-negative and the first fetus is Rh-positive, the mother's immune system may become sensitized during delivery. In subsequent pregnancies with Rh-positive fetuses, maternal anti-Rh antibodies (IgG) can cross the placenta and attack fetal RBCs, causing hemolytic disease of the newborn (erythroblastosis fetalis).
c) Mom is Rh-negative and fetus is Rh-negative: No immune response is triggered; both are Rh-negative.
d) Mom is Rh-positive and fetus is Rh-negative: No risk; maternal antibodies are not formed against Rh-negative cells.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C,B,A
No explanation
Correct Answer is B
Explanation
a) Is the vascular connection between the anterior pituitary and the hypothalamus: This describes the hypophyseal portal system, not the tract.
b) Is the neural connection between the hypothalamus and the neurohypophysis (posterior pituitary): The hypothalamic-hypophyseal tract consists of axons that transport oxytocin and ADH from the hypothalamus to the posterior pituitary for storage and release.
c) Conducts aldosterone to the hypophysis: Aldosterone is produced by the adrenal cortex and is not transported by this tract.
d) Is the site of prolactin synthesis: Prolactin is synthesized in the anterior pituitary, not in the hypothalamic-hypophyseal tract.
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