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 child sitting on a chair in a playroom starts to have a tonic-clonic seizure with a clenched jaw. What is the nurse’s best initial action?

• A. Attempt to open the jaw.
• B. Place the child on the floor.
• C. Call out for assistance from staff.
• D. Place a pillow under the child’s head.

Correct answer: B

Rationale: The best initial action during a tonic-clonic seizure is to place the child on the floor. This action helps prevent injury by providing a safe environment and allows for better management of the seizure episode. Attempting to open the jaw is not recommended as it may cause harm to the child or the nurse. Calling out for assistance is important but should not delay ensuring the child's safety first. Placing a pillow under the child's head is not advisable during a seizure as it can pose a risk of suffocation or choking.

3. .The parents of a 6-week-old infant who was born without an immune system ask a nurse why their baby is still so healthy. How should the nurse reply?

• A. Exposure to pathogens during this time can be limited.
• B. Some antibodies are produced by the infant’s colonic bacteria.
• C. Antibodies are passively received from the mother through the placenta and breast milk.
• D. Fewer antibodies are produced by the fetal thymus during the eighth and ninth months of gestation.

Correct answer: C

Rationale: Infants receive passive immunity through antibodies from the mother during pregnancy and breastfeeding, which protect them initially.

4. A parent receives a note from the school that a student in class has head lice. The parent calls the school nurse to ask how to check for head lice. What instructions should the nurse provide?

• A. Ask the child where it itches.
• B. Check to see if your dog has ear mites.
• C. Look along the scalp line for white dots.
• D. Observe between the fingers for red lines.

Correct answer: C

Rationale: The correct answer is to look along the scalp line for white dots (nits) when checking for head lice. White dots are indicative of head lice infestation. Itching alone, as mentioned in choice A, is not a reliable indicator of head lice. Choice B is irrelevant as it refers to checking for ear mites in a dog, not head lice in a human. Observing between the fingers for red lines, as in choice D, is not a method to check for head lice.

5. Which observation made of the exposed abdomen is most indicative of pyloric stenosis?

• A. abdominal rigidity
• B. substernal retraction
• C. palpable olive-like mass
• D. marked distention of lower abdomen

Correct answer: C

Rationale: The correct answer is C: palpable olive-like mass. In pyloric stenosis, a palpable olive-like mass can often be felt in the abdomen due to the hypertrophied pyloric muscle. This mass is a key characteristic finding in infants with pyloric stenosis. Choice A, abdominal rigidity, is more commonly associated with conditions like peritonitis. Choice B, substernal retraction, is not typically seen in pyloric stenosis but can be a sign of respiratory distress. Choice D, marked distention of the lower abdomen, is not specific to pyloric stenosis and can be present in various abdominal conditions.

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