Nursing Elites

1. 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: The correct answer is A: nondisjunction. Trisomy 21, also known as Down syndrome, is caused by nondisjunction, which is an error in cell division leading to an extra copy of chromosome 21. This additional genetic material alters the course of development and causes the characteristics associated with Down syndrome. Choices B, C, and D are incorrect. X-linked recessive inheritance refers to genetic disorders carried on the X chromosome, genomic imprinting involves gene expression based on parental origin, and autosomal dominant inheritance relates to disorders caused by a dominant gene on one of the non-sex chromosomes. In the case of trisomy 21, the cause is specifically related to the error in chromosome division, making nondisjunction the most appropriate answer.

2. A 6-month-old infant is diagnosed with cystic fibrosis. What explanation should the nurse provide to the parents about this condition?

• A. It is a condition affecting the respiratory and digestive systems.
• B. It is an autoimmune disorder affecting multiple organs.
• C. It is a genetic disorder that can be managed with medication.
• D. It is a condition caused by prenatal exposure to toxins.

Correct answer: A

Rationale: The correct answer is A: 'It is a condition affecting the respiratory and digestive systems.' Cystic fibrosis is a genetic disorder that primarily affects the respiratory and digestive systems. It is caused by a defective gene that leads to the production of thick and sticky mucus in these organs. This mucus can clog airways in the lungs and block the ducts in the pancreas, affecting digestion. Choice B is incorrect because cystic fibrosis is not an autoimmune disorder; it is a genetic condition. Choice C is partially correct in that cystic fibrosis is a genetic disorder, but merely managing it with medication oversimplifies the comprehensive care needed for individuals with cystic fibrosis. Choice D is incorrect as cystic fibrosis is not caused by prenatal exposure to toxins but is a genetic condition inherited from parents.

3. What is the first action to take before administering tube feeding to an infant?

• A. Irrigate the tube with water.
• B. Offer a pacifier to the infant.
• C. Slowly instill 10 mL of formula.
• D. Place the infant in the Trendelenburg position.

Correct answer: B

Rationale: The correct first action before administering tube feeding to an infant is to offer a pacifier. Providing a pacifier stimulates the sucking reflex, aiding in digestion and providing comfort to the infant. Irrigating the tube with water (Choice A) is not typically the initial step and could potentially introduce unnecessary fluid into the infant's system. Slowly instilling formula (Choice C) should only be done after ensuring the tube is appropriately placed. Placing the infant in the Trendelenburg position (Choice D) is not necessary for tube feeding and could pose risks such as aspiration.

4. A nurse in the emergency department observes large welts and scars on the back of a child who has been admitted for an asthma attack. What additional information must be included in the nurse’s assessment?

• A. History of an injury
• B. Signs of child abuse
• C. Presence of food allergies
• D. Recent recovery from chickenpox

Correct answer: B

Rationale: The correct answer is B: Signs of child abuse. Large welts and scars on a child may be indicative of abuse, making it crucial for the nurse to assess and report any suspicions. Assessing the history of an injury (choice A) may not provide insight into the cause of the welts and scars as effectively as looking for signs of potential abuse. Food allergies (choice C) and recent recovery from chickenpox (choice D) are not directly relevant to the observation of welts and scars on the child's back.

5. What explanation should the nurse provide to the parents of a 6-month-old infant diagnosed with cystic fibrosis?

• A. It is a condition affecting the respiratory and digestive systems.
• B. It is an autoimmune disorder affecting multiple organs.
• C. It is a genetic disorder that can be managed with medication.
• D. It is a condition caused by prenatal exposure to toxins.

Correct answer: A

Rationale: The correct answer is A. Cystic fibrosis is a genetic disorder that primarily affects the respiratory and digestive systems. It results in the production of thick, sticky mucus that can clog the lungs and obstruct the pancreas. This explanation is crucial for parents to understand the impact of the condition on their child's health. Choice B is incorrect because cystic fibrosis is not an autoimmune disorder. Choice C is partially correct in that cystic fibrosis is a genetic disorder, but it requires a comprehensive management approach beyond just medication. Choice D is incorrect as cystic fibrosis is not caused by prenatal exposure to toxins but rather by inheriting specific genetic mutations.

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