An nurse is counseling a new mother about the immunologic properties of breast milk. The nurse emphasizes that breast milk is the main source of which specific immunoglobulin?
Select one:

IgG.

IgE.

IgA.

IgM.

Answer and Explanation

The Correct Answer is C

Choice A Reason: IgG. This is an incorrect answer that refers to a diﬀerent type of antibody that is not abundant in breast milk. IgG is a type of antibody that provides systemic immunity against various antigens. IgG is found in low concentrations in breast milk, as it does not cross the mammary epithelium easily. IgG can protect the infant from some infections, but it is mainly transferred from the mother to the fetus through the placenta during pregnancy.

Choice B Reason: IgE. This is an incorrect answer that refers to a diﬀerent type of antibody that is not relevant to breast milk. IgE is a type of antibody that mediates allergic reactions and parasitic infections. IgE is found in very low concentrations in breast milk, as it does not have a significant role in mucosal immunity. IgE can trigger mast cells and basophils to release histamine and other inﬂammatory mediators, which can cause symptoms such as itching, swelling, or bronchoconstriction.

Choice C Reason: IgA. This is because IgA is a type of antibody that protects mucosal surfaces from pathogens and toxins. IgA is found in high concentrations in breast milk, especially in colostrum (the first milk produced after delivery). IgA can bind to bacteria and viruses in the infant's gastrointestinal tract and prevent them from ataching to the intestinal wall or crossing into the bloodstream. IgA can also enhance the infant's immune system by stimulating lymphoid tissue development and modulating inﬂammatory responses.

Choice D Reason: IgM. This is an incorrect answer that refers to a diﬀerent type of antibody that is not abundant in breast milk. IgM is a type of antibody that activates complement system and agglutinates antigens. IgM is found in low concentrations in breast milk, as it does not cross the mammary epithelium easily due to its large size. IgM can protect the infant from some infections, but it is mainly produced by the infant's own immune system in response to exposure to antigens.

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Correct Answer is B

Explanation

Choice A Reason: Shoulder dystocia. This is an incorrect answer that describes a diﬀerent obstetric complication. Shoulder dystocia is a condition where the baby's shoulder gets stuck behind the mother's pubic bone during delivery, which can cause nerve injury, fracture, or asphyxia to the baby. Shoulder dystocia does not cause fetal bradycardia, abdominal pain, or vaginal bleeding.

Choice B Reason: Placental abruption. This is a correct answer that explains the symptoms of fetal bradycardia, abdominal pain, and vaginal bleeding in a woman with a history of crack cocaine use. Placental abruption. This is because placental abruption is a condition where the placenta separates from the uterine wall before delivery, which can cause fetal distress, maternal hemorrhage, and shock. Placental abruption can be triggered by maternal hypertension, trauma, or substance abuse, such as crack cocaine.

Choice C Reason: Anaphylactoid syndrome of pregnancy. This is an incorrect answer that refers to a rare and fatal condition also known as amniotic ﬂuid embolism. Anaphylactoid syndrome of pregnancy is a condition where amniotic ﬂuid enters into the maternal bloodstream and causes an allergic reaction, which can lead to respiratory failure, cardiac arrest, coagulopathy, and coma. Anaphylactoid syndrome of pregnancy does not cause fetal bradycardia or vaginal bleeding.

Choice D Reason: Placenta previa. This is an incorrect answer that indicates another placental disorder. Placenta previa is a condition where the placenta covers or is near the cervix, which can cause painless bright red bleeding during pregnancy or labor. Placenta previa does not cause fetal bradycardia or abdominal pain.

A. The cheek of the newborn is touched, and the newborn turns toward the side that was touched. B. The newborn is suddenly lowered or startled, and they extend their arms, legs and neck, then rapidly bring their arms together. C. The newborn is supine and their head is turned to one side, then the arm on that same side extends. D. The lateral aspect of the sole of the newborn's foot is stroked, and the toes extend and fan outward.

Correct Answer is B

Explanation

Choice A Reason: The cheek of the newborn is touched, and the newborn turns toward the side that was touched. This is an incorrect answer that describes a diﬀerent reﬂex called the rooting reﬂex. The rooting reﬂex is a feeding reﬂex that helps the newborn locate the nipple and initiate sucking. The rooting reﬂex is elicited by stroking the cheek or corner of the mouth of the newborn, which causes them to turn their head and open their mouth toward the stimulus.

Choice B Reason: The newborn is suddenly lowered or startled, and they extend their arms, legs and neck, then rapidly bring their arms together. This is because this response describes the Moro reﬂex, which is a primitive reﬂex that is present at birth and disappears by 3 to 6 months of age. The Moro reﬂex is elicited by simulating a falling sensation or a loud noise, which triggers a fear response in the newborn. The Moro reﬂex consists of four phases: extension, abduction, adduction, and crying.

Choice C Reason: The newborn is supine and their head is turned to one side, then the arm on that same side extends. This is an incorrect answer that refers to another reﬂex called the tonic neck reﬂex. The tonic neck reﬂex is a postural reﬂex that helps prepare the newborn for voluntary reaching. The tonic neck reﬂex is elicited by placing the newborn in a supine position and turning their head to one side, which causes them to assume a "fencing" posture with one arm extended and one arm ﬂexed.

Choice D Reason: The lateral aspect of the sole of the newborn's foot is stroked, and the toes extend and fan outward. This is an incorrect answer that indicates a diﬀerent reﬂex called the Babinski reﬂex. The Babinski reﬂex is a neurological reﬂex that tests for spinal cord integrity. The Babinski reﬂex is elicited by stroking the lateral aspect of the sole of the foot from heel to toe, which causes the big toe to dorsiﬂex and the other toes to fan out.

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An nurse is counseling a new mother about the immunologic properties of breast milk. The nurse emphasizes that breast milk is the main source of which specific immunoglobulin? Select one:

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Naxlex Comprehensive Predictor Exams

Correct Answer is B

Explanation

The nurse is performing a newborn physical assessment and is about to elicit the Moro reﬂex. Which of the following responses should the nurse expect to see? Select one:

Correct Answer is B

Explanation

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An nurse is counseling a new mother about the immunologic properties of breast milk. The nurse emphasizes that breast milk is the main source of which specific immunoglobulin?
Select one: