Correct Answer: D

Rationale: Type 1 diabetes is characterized by the inability of the beta cells in the pancreas to secrete insulin. Choice A is correct because it highlights the role of beta cells. Choice B is accurate as the endocrine function of the pancreas includes insulin secretion. Choice C is true as without insulin, ketoacidosis can develop. Choice D is incorrect as the exocrine function of the pancreas involves secreting digestive enzymes, not estrogen.

Correct Answer: B

Rationale: A beach ball is appropriate for an 18-month-old as it is safe and can help with motor skills development. Choice A, storybooks, may not be suitable for this age group due to limited attention span. Choice C involves interaction with other children which may not always be feasible in a healthcare setting. Choice D, pickup sticks, poses a choking hazard and is not suitable for toddlers.

Correct Answer: B

Rationale: The correct answer is B. When rounding off to the nearest tenth, 1.027 becomes 1.0 because the digit in the hundredth's place is less than 5. For the other numbers, they are rounded correctly to the nearest tenth: 5.5778 = 5.6, 62.999 = 63, 55.123 = 55.1, 96.676 = 96.7. Therefore, option B is the most accurate in rounding off these numbers to the nearest tenth. Choices A, C, and D are incorrect as they do not round 1.027 to 1.0 as required when rounding to the nearest tenth.

Correct Answer: C

Rationale: After a client complains of nausea and vomits one hour after taking glyburide, the priority nursing intervention should be to monitor blood glucose closely and look for signs of hypoglycemia. Vomiting could indicate that the glyburide was not properly absorbed, potentially leading to hypoglycemia. Administering glyburide again (Choice A) could worsen hypoglycemia. Administering subcutaneous insulin (Choice B) is not appropriate without assessing the blood glucose first. Monitoring for signs of hyperglycemia (Choice D) is not the immediate concern in this situation.

Correct Answer: A

Rationale: The correct answer is A: 2% to 4%. According to research, 2% to 4% of term newborns have congenital heart disease due to environmental risk factors such as maternal alcoholism or drug ingestion. Choices B, C, and D provide percentages that are higher than the actual prevalence of congenital heart disease in newborns caused by environmental factors, making them incorrect.