which statement correctly explains the etiology of down syndrome
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1. Which statement correctly explains the etiology of Down syndrome?

Correct answer: A

Rationale: The correct answer is A: 'There is an extra chromosome on the 21st pair.' Down syndrome is caused by the presence of an extra copy of chromosome 21, known as trisomy 21. This additional genetic material leads to the characteristics associated with Down syndrome. Choices B, C, and D are incorrect because Down syndrome is not due to a missing chromosome or having two pairs of the 21st chromosome; it results from the presence of an extra chromosome on the 21st pair.

2. What most influences the severity of respiratory distress syndrome (RDS)?

Correct answer: B

Rationale: The correct answer is B. The gestational age at birth most influences the severity of respiratory distress syndrome (RDS). RDS is caused by a deficiency of surfactant and it occurs almost exclusively in preterm, low-birth weight infants. Therefore, the gestational age at birth is a key factor in determining the likelihood and severity of RDS. Choices A, C, and D are incorrect as they do not directly relate to the primary factor influencing the severity of RDS.

3. The nurse is teaching a client with gastroesophageal reflux disease (GERD) about dietary modifications. Which food should the client avoid?

Correct answer: C

Rationale: The correct answer is C: Coffee. Coffee should be avoided by clients with GERD as it can relax the lower esophageal sphincter, leading to an increase in GERD symptoms. Choices A, B, and D are not directly associated with worsening GERD symptoms and can be included in moderation in the diet of a client with GERD.

4. The nurse caring for a hospitalized older client with a left hip fracture as a result of a fall at home notices different assessment findings. Which assessment finding warrants immediate intervention by the nurse?

Correct answer: D

Rationale: The correct answer is D. A left extremity capillary refill greater than 5 seconds indicates poor blood flow to the extremity, which is a sign of compromised circulation. This finding requires immediate intervention by the nurse to prevent complications such as tissue damage or necrosis. Choices A, B, and C are important assessments but do not indicate an immediate need for intervention like the delayed capillary refill in choice D.

5. Recurrent abdominal pain (RAP) is most often seen in school-age or adolescent children. The nurse should assess closely for what potential problem?

Correct answer: D

Rationale: The correct answer is D: 'Emotional problems.' Recurrent abdominal pain (RAP) in children is frequently associated with emotional factors rather than physical issues, relational problems, or eating disorders. Children may manifest emotional distress through physical symptoms like abdominal pain, making it crucial for nurses to assess for emotional problems as a potential cause.

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