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. A client with urolithiasis is preparing for discharge after lithotripsy. Which intervention should the nurse include in the client's postoperative discharge instructions?

Correct answer: D

Rationale: After lithotripsy, monitoring the urinary stream for a decrease in output is essential to identify any potential complications such as urinary retention or obstruction. Reporting pink-tinged hematuria is important, but monitoring the urinary stream for a decrease in output takes precedence as it directly assesses renal function and potential complications. Using an incentive spirometer is not directly related to post-lithotripsy care. Restricting physical activities may be necessary initially but is not the priority compared to monitoring urinary output.

3. A client with type 1 diabetes mellitus is experiencing nausea and vomiting. What is the most important instruction the nurse should provide?

Correct answer: D

Rationale: The correct answer is to instruct the client to check blood glucose levels frequently. During illness, such as nausea and vomiting, managing blood glucose levels is crucial in clients with type 1 diabetes mellitus. Monitoring blood glucose levels frequently helps in adjusting insulin doses appropriately, preventing complications like hyperglycemia or hypoglycemia. Choice A is incorrect because stopping insulin abruptly can lead to serious complications. Choice B is important but not the most critical in this scenario. Choice C is incorrect as high-carbohydrate foods may further affect blood glucose levels negatively.

4. In a disaster area, a nurse assesses an adult male with partial-thickness burns on his lower legs, approximately 10% of his lower body. Which color of triage tag should the nurse place on this client?

Correct answer: A

Rationale: A yellow triage tag should be placed on the client with partial-thickness burns covering 10% of his lower body. Yellow tags indicate delayed treatment, suitable for serious injuries that are not immediately life-threatening. Black tags are used for deceased individuals, red tags for immediate treatment of life-threatening injuries, and green tags for minor injuries.

5. The mother of a child with acute laryngotracheobronchitis (LTB) asks why her child must be kept NPO. Which response would be the most correct?

Correct answer: D

Rationale: The correct answer is D because rapid respirations predispose to aspiration in a child with acute laryngotracheobronchitis. Choice A is incorrect because epinephrine does not directly relate to the need for NPO status. Choice B is incorrect as hydration with IV fluids is not the primary reason for keeping the child NPO. Choice C is incorrect as the child being hungry is not the main concern when keeping a child NPO in this situation.

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