Nokea
When teaching a class about trisomy 21, the instructor would identify the cause of this disorder as:
- A. nondisjunction.
- B. X-linked recessive inheritance.
- C. genomic imprinting.
- D. autosomal dominant inheritance.
Correct Answer: A
Rationale: Trisomy 21, also known as Down syndrome, is caused by nondisjunction, which is an error in cell division that leads to the presence of an extra chromosome 21. This additional chromosome alters the normal genetic makeup, resulting in the characteristics associated with Down syndrome. Therefore, the correct answer is nondisjunction (Choice A). Choices B, C, and D are incorrect because Trisomy 21 is not caused by X-linked recessive inheritance, genomic imprinting, or autosomal dominant inheritance. Understanding the specific genetic mechanism involved in Trisomy 21 is crucial for grasping the basis of this chromosomal disorder.
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A child with Duchenne muscular dystrophy is to receive prednisone as part of his treatment plan. After teaching the child's parents about this drug, which statement by the parents indicates the need for additional teaching?
- A. We should give this drug after he eats something.
- B. We need to watch carefully for possible infections.
- C. The drug should not be stopped abruptly.
- D. He might experience weight gain with this drug.
Correct Answer: A
Rationale: Giving prednisone with food helps prevent gastrointestinal upset. Therefore, the correct statement is that the drug should be given after the child eats something, not before. Watching for infections is important due to prednisone's immunosuppressive effects, making choice B correct. Choice C is accurate because prednisone should be tapered off gradually to prevent withdrawal symptoms. Weight gain is a common side effect of prednisone, so choice D is also correct. The incorrect statement is choice A, as prednisone should be administered after a meal.
A healthcare professional is reviewing the clinical records of infants and children with cardiac disorders who developed heart failure. What did the healthcare professional determine is the last sign of heart failure?
- A. Tachypnea
- B. Tachycardia
- C. Peripheral edema
- D. Periorbital edema
Correct Answer: C
Rationale: Peripheral edema is often the last sign of heart failure in infants and children as it indicates significant fluid retention and circulatory compromise. Tachypnea (Choice A) and tachycardia (Choice B) are early signs of heart failure due to the body's compensatory mechanisms. Periorbital edema (Choice D) can occur in heart failure but is not typically the last sign; it is more commonly associated with renal or hepatic dysfunction.
The healthcare provider is assessing a family to determine if they have access to adequate health care. Which statement accurately describes how certain families are affected by common barriers to health care?
- A. After a decade of escalation, the percentage of children living in low-income families has been declining since 2000.
- B. White, non-Hispanic children overall are more likely than African American and Hispanic children to be in very good or excellent health.
- C. The proportion of children between the ages of 6 and 18 who are overweight is decreasing, but there is a significant increase in African American females.
- D. The overall health care plan of working families may improve access to specialty care but limit access to preventive services.
Correct Answer: B
Rationale: Choice B is the correct answer as white, non-Hispanic children are more likely to be in very good or excellent health compared to African American and Hispanic children. This is an important disparity in health outcomes that may be influenced by various social determinants. Choices A, C, and D are incorrect because they do not accurately describe how certain families are affected by common barriers to health care. Choice A discusses the declining percentage of children in low-income families, which is not directly related to barriers to health care. Choice C talks about overweight children and the increase in African American females but does not address access to health care. Choice D discusses the impact of health care plans on working families but does not specifically address barriers to health care access for families.
The nurse is reviewing the laboratory test results of a child with Addison's disease. What would the nurse expect to find?
- A. Hypernatremia
- B. Hyperkalemia
- C. Hyperglycemia
- D. Hypercalcemia
Correct Answer: B
Rationale: In Addison's disease, adrenal insufficiency leads to decreased aldosterone production. The decreased aldosterone results in impaired sodium reabsorption and potassium excretion, leading to hyperkalemia. Hypernatremia (Choice A) is unlikely because sodium reabsorption is impaired. Hyperglycemia (Choice C) is not a typical lab finding in Addison's disease. Hypercalcemia (Choice D) is not associated with Addison's disease; rather, it can be seen in conditions like hyperparathyroidism.
A 12-month-old infant has become immunosuppressed during a course of chemotherapy. When preparing the parents for the infant's discharge, what information should the nurse give concerning the measles, mumps, and rubella (MMR) immunization?
- A. It should not be given until the infant reaches 2 years of age.
- B. Infants who are receiving chemotherapy should not be given these vaccines.
- C. It should be given to protect the infant from contracting any of these diseases.
- D. The parents should discuss this with their healthcare provider at the next visit.
Correct Answer: B
Rationale: Live vaccines, like the measles, mumps, and rubella (MMR) vaccine, should not be administered to immunosuppressed infants, such as those undergoing chemotherapy. The weakened immune system of these infants may not be able to handle live vaccines safely, potentially leading to severe complications. Therefore, it is crucial to avoid giving live vaccines like MMR to infants receiving chemotherapy. Choice A is incorrect as delaying the MMR vaccine until the infant reaches 2 years of age is not the main concern in this scenario. Choice C is incorrect because although MMR vaccination is important for disease prevention, it should not be given to immunosuppressed infants. Choice D is incorrect as immediate action is needed to prevent potential harm from live vaccines in immunosuppressed infants.