HESI LPN
Maternity HESI Test Bank
1. Monozygotic (MZ) twins share _________ percent of their genes.
- A. 100
- B. 75
- C. 50
- D. 25
Correct answer: A
Rationale: Monozygotic (MZ) twins share 100% of their genes because they originate from the same fertilized egg that splits into two, resulting in identical genetic material for both twins. Choice B (75%) is incorrect as it implies a partial genetic similarity, which is not the case for MZ twins. Choice C (50%) is incorrect as it suggests half of the genes are shared, which is applicable to dizygotic (DZ) twins, not MZ. Choice D (25%) is incorrect as it indicates minimal genetic sharing, which is not true for MZ twins.
2. A client has a new prescription for a home oxygen concentrator. Which of the following instructions should the nurse provide to the client and their family?
- A. Check the cord routinely for frays or tearing
- B. Use oxygen around open flames
- C. Store oxygen concentrator in a closet
- D. Wear synthetic clothing to prevent static electricity
Correct answer: A
Rationale: The correct answer is to instruct the client and their family to check the cord routinely for frays or tearing. This is crucial to ensure the safety and proper function of the oxygen concentrator. Choice B is incorrect because oxygen should never be used around open flames due to the risk of fire. Choice C is also incorrect as oxygen cylinders or concentrators should not be stored in a closet due to ventilation and safety concerns. Choice D is incorrect because synthetic clothing can generate static electricity, which could pose a risk around oxygen equipment.
3. A client with a history of hypertension is prescribed a low-sodium diet. Which food should the LPN/LVN recommend the client avoid?
- A. Fresh fruits
- B. Grilled chicken
- C. Whole grain bread
- D. Canned soup
Correct answer: D
Rationale: The correct answer is D, canned soup. Canned soups are often high in sodium content, which can be harmful to individuals with hypertension following a low-sodium diet. Fresh fruits, grilled chicken, and whole grain bread are generally healthier options with lower sodium content and can be included in a low-sodium diet. Fresh fruits provide essential vitamins and minerals, grilled chicken is a lean protein source, and whole grain bread offers fiber and nutrients without excessive sodium levels. Avoiding canned soup aligns with the goal of reducing sodium intake to manage hypertension.
4. Select the stage of shock that is accurately paired with its characteristic.
- A. The initial stage of shock: Hyperventilation occurs and the blood pH rises.
- B. The compensatory stage of shock: Hypoxia occurs and lactic acid rises.
- C. The progressive stage of shock: Histamine is released; fluid and proteins leak into surrounding tissues and the blood thickens.
- D. The refractory stage of shock: Potassium ions leak out; sodium ions build up, and metabolic acidosis increases.
Correct answer: C
Rationale: The progressive stage of shock is accurately described as the stage where histamine is released, leading to fluid and proteins leaking into surrounding tissues and the blood thickening. In this stage, the body's compensatory mechanisms are overwhelmed, resulting in a cascade of events that worsen the shock state. Choice A is incorrect as hyperventilation and a rise in blood pH are more characteristic of the compensatory stage. Choice B is incorrect as hypoxia and a rise in lactic acid are more typical of the progressive stage. Choice D is incorrect as the described electrolyte imbalances and metabolic acidosis are more aligned with the refractory stage of shock.
5. The parents of a newborn with phenylketonuria (PKU) need help and support in adhering to specific dietary restrictions. They ask the nurse, “How long will our child have to be on this diet?” How should the nurse respond?
- A. “We are still not sure; you should discuss this with your health care provider.”
- B. “If your baby does well, foods containing protein can gradually be introduced.”
- C. “Your child needs to be on this diet at least through adolescence and into adulthood.”
- D. “This is a lifelong problem, and it is recommended that dietary restrictions must be continued.”
Correct answer: D
Rationale: The correct answer is D: “This is a lifelong problem, and it is recommended that dietary restrictions must be continued.” Phenylketonuria (PKU) is a metabolic disorder where the body cannot process phenylalanine properly. The diet for PKU must be continued lifelong to prevent cognitive and developmental issues, as phenylalanine buildup can cause irreversible damage. Choice A is incorrect because the nurse should provide information about the lifelong nature of the dietary restrictions for PKU. Choice B is incorrect as it suggests reintroducing protein-containing foods, which is not recommended for individuals with PKU. Choice C is incorrect as it underestimates the duration of the necessary dietary restrictions for PKU.