Correct Answer: C

Rationale: Most peptic ulcers occur in the duodenum, particularly in cases of duodenal ulcers. Peptic ulcers are most commonly found in the duodenum or the first part of the small intestine. While ulcers can also occur in the esophagus and stomach, they are predominantly located in the duodenum. Therefore, options A, B, and D are incorrect.

Correct Answer: D

Rationale: The correct answer is D. In Type 2 diabetes, the primary issue is insulin resistance, where cells do not respond effectively to insulin. Choice A is incorrect because in Type 1 diabetes, the islet cells in the pancreas stop producing insulin. Choice B is not directly related to the development of Type 2 diabetes but rather to its management. Choice C is incorrect as it refers to a dysfunction in vasopressin production, which is not related to Type 2 diabetes.

Correct Answer: D

Rationale: Older men and women are at higher risk for drug-nutrient interactions due to factors such as polypharmacy and physiological changes. Polypharmacy, common in older adults, increases the likelihood of interactions between drugs and nutrients. Physiological changes that occur with aging can affect how drugs and nutrients are absorbed, distributed, metabolized, and excreted in the body. Infants, people with diabetes, and women of childbearing age are not typically considered high-risk groups for drug-nutrient interactions compared to older adults.

Correct Answer: A

Rationale: The correct answer is A, weight loss. Metformin is commonly associated with weight loss rather than weight gain. Metformin works by decreasing glucose production in the liver and improving insulin sensitivity, which can lead to weight loss in some individuals. Choices B, C, and D are incorrect. Weight gain is not a typical side effect of metformin. Drowsiness and hypertension are also not commonly associated with metformin use.

Correct Answer: B

Rationale: Patients evacuated from the theater of operations and expected to return within 60 days are admitted to DOD tri-service hospitals. These hospitals are well-equipped to handle military personnel and are strategically placed for operational efficiency. Choice A, civilian hospitals participating in the National Disaster Medical System, may not have the specialized care and resources required for military personnel. Choice C, Department of Veterans Affairs hospitals, cater to veterans rather than active-duty personnel in theater. Choice D, temporary field hospitals, might not provide the comprehensive care and resources needed for an extended period of treatment.