HESI LPN
HESI Focus on Maternity Exam
1. What is the typical sex chromosome pattern for males?
- A. XX
- B. XYY
- C. XY
- D. XXY
Correct answer: C
Rationale: The correct answer is C: XY. In males, the typical sex chromosome pattern consists of one X chromosome and one Y chromosome. Choice A (XX) is the sex chromosome pattern for females. Choice B (XYY) is a chromosomal disorder where males have an extra Y chromosome. Choice D (XXY) is the sex chromosome pattern associated with Klinefelter syndrome, a condition where males have an extra X chromosome.
2. A client who is receiving prenatal care is at her 24-week appointment. Which of the following laboratory tests should the nurse plan to conduct?
- A. Group B strep culture
- B. 1-hour glucose tolerance test
- C. Rubella titer
- D. Blood type and Rh
Correct answer: B
Rationale: The correct answer is B: 1-hour glucose tolerance test. At around 24-28 weeks of gestation, a pregnant individual is typically screened for gestational diabetes. The 1-hour glucose tolerance test helps in identifying elevated blood sugar levels during pregnancy. Choice A, Group B strep culture, is not typically performed at the 24-week appointment but later in the third trimester to screen for Group B streptococcus colonization. Choice C, Rubella titer, is usually checked early in pregnancy to determine immunity to rubella. Choice D, Blood type and Rh, is important for determining the client's blood type and Rh status, but it is usually done earlier in pregnancy and not specifically at the 24-week appointment.
3. Which neonatal complications are associated with hypertension in the mother?
- A. Intrauterine growth restriction (IUGR) and prematurity.
- B. Seizures and cerebral hemorrhage.
- C. Hepatic or renal dysfunction.
- D. Placental abruption and DIC.
Correct answer: A
Rationale: Neonatal complications associated with maternal hypertension are primarily due to placental insufficiency. The correct answer is A, which includes Intrauterine Growth Restriction (IUGR) and prematurity. These complications arise from inadequate blood flow to the fetus, leading to growth restriction and premature birth. Choices B, seizures, and cerebral hemorrhage are more commonly maternal complications rather than neonatal ones. Choice C, hepatic or renal dysfunction, pertains to maternal complications of hypertensive disorders in pregnancy, not neonatal issues. Choice D, placental abruption, and Disseminated Intravascular Coagulation (DIC) are conditions linked to maternal morbidity and mortality, not neonatal complications.
4. Polygenic traits are those that are:
- A. developed during adolescence.
- B. transmitted by the mother.
- C. uncommon in humans.
- D. determined by several pairs of genes.
Correct answer: D
Rationale: Polygenic traits, such as height and skin color, are determined by several pairs of genes working together. These traits are influenced by the combined effects of multiple genes across the genome, rather than being controlled by a single gene pair. Choices A, B, and C are incorrect because polygenic traits are not specifically developed during adolescence, transmitted by the mother, or uncommon in humans. Understanding polygenic traits is essential in genetics as they demonstrate the complexity of genetic inheritance and the influence of multiple genes on a single trait.
5. When should a nurse on a labor and delivery unit instruct a newly licensed nurse to don gloves for a procedure?
- A. Assisting a mother with breastfeeding
- B. Performing a newborn's initial bath
- C. Administering the measles, mumps, rubella vaccine
- D. Performing umbilical cord care
Correct answer: B
Rationale: The correct answer is B: Performing a newborn's initial bath. Gloves should be worn during this procedure to protect against exposure to body fluids, such as amniotic fluid or blood. Assisting a mother with breastfeeding (Choice A) does not typically require gloves unless there are specific reasons for infection control. Administering vaccines (Choice C) and performing umbilical cord care (Choice D) are procedures that may require hand hygiene but not necessarily gloves, unless there is active bleeding or potential exposure to body fluids. The initial bath involves direct contact with body fluids, making it crucial to wear gloves for protection.
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