Correct Answer: B

Rationale: Rationale: The correct answer is B because the kidneys do not reabsorb carbon dioxide to regulate acid-base balance. Carbon dioxide is mainly regulated by the lungs through respiration. The kidneys regulate acid-base balance by excreting hydrogen ions, reabsorbing or excreting bicarbonate (HCO3-) into the blood, and retaining or excreting hydrogen ions. Reabsorbing carbon dioxide is not a mechanism utilized by the kidneys for acid-base balance. Choices A, C, and D are correct mechanisms involved in acid-base balance regulation by the kidneys.

Correct Answer: B

Rationale: The correct answer is B: helicobacter pylori infection. This bacterium is a major cause of peptic ulcers by weakening the protective mucous layer of the stomach and duodenum. Research has shown a strong association between H. pylori infection and peptic ulcer development. Genetic defects in the gastric mucosa (choice A) are not a proven cause of peptic ulcers. While a high-fat diet (choice C) can exacerbate symptoms, it is not the primary cause. Work-related stress (choice D) may exacerbate symptoms but is not a direct cause of peptic ulcers. Therefore, choice B is the most supported and logical answer based on current research findings.

Correct Answer: A

Rationale: Correct Answer: A Rationale: 1. Asking if the patient feels the need to go to the bathroom helps assess urgency. 2. Urinary retention may lead to the inability to sense the urge to void. 3. This question directly addresses the issue of voiding, crucial in diagnosing urinary retention. Summary: B: Mobility is not directly related to urinary retention. C: Medication timing is important but not directly related to urinary retention. D: Safety rail inquiry is more related to fall prevention, not urinary retention.

Correct Answer: A

Rationale: The correct answer is A: Pregnancy. During pregnancy, the need for iron increases significantly to support the growth of the fetus and to prevent maternal anemia. Iron is essential for the production of hemoglobin and for oxygen transport in the blood. In contrast, infants require iron for rapid growth and development, making choice B partially correct. Choice C (Old age) and choice D (Male reproductive years) are incorrect as the need for iron typically decreases in old age and remains relatively stable during male reproductive years.

Correct Answer: A

Rationale: Rationale: 1. By approaching the patient from the other side, the nurse can assess if the patient has a visual field deficit. 2. This step helps determine if the lack of response is due to a sensory issue. 3. It allows the nurse to rule out unilateral neglect or hemianopsia. 4. Walking to the other side is a basic assessment technique to evaluate visual and sensory deficits in poststroke patients. Other Choices: B. Speaking more loudly and clearly may not address the potential sensory issues the patient is experiencing. C. Waving fingers in front of the patient's face does not provide a comprehensive assessment of visual field deficits. D. Using a picture may be helpful, but addressing the potential visual field deficit should be prioritized first.