Correct Answer: A

Rationale: The correct answer is A. Lying flat in the supine position for 12 hours after a renal biopsy is essential to prevent bleeding and promote recovery. This position helps apply pressure to the biopsy site, reducing the risk of bleeding. Choices B, C, and D are incorrect because continuing oral fluids restriction, changing the dressing, and activating the patient-controlled analgesia pump do not directly indicate compliance with the crucial post-biopsy teaching of maintaining the supine position.

Correct Answer: B

Rationale: The correct answer is B: Iodine. Iodine is essential for thyroid hormone production, and its deficiency can contribute to hypothyroidism. While calcium, vitamin C, and iron are important for overall health, they are not specifically related to thyroid function. Calcium is more associated with bone health, vitamin C with immune function, and iron with red blood cell production.

Correct Answer: D

Rationale: The correct answer is D. Reporting a decrease in daily weight is crucial when managing nephritic syndrome as it can indicate worsening of the condition or dehydration. It is essential to monitor weight changes closely to assess the effectiveness of treatment and the client's fluid status. Choice A is incorrect because discontinuing steroid therapy abruptly can lead to complications; gradual tapering is usually recommended. Choice B is incorrect as diuretics should be taken as prescribed by the healthcare provider to manage fluid retention. Choice C is also incorrect because increasing dietary sodium can exacerbate fluid retention, which is counterproductive in nephritic syndrome.

Correct Answer: B

Rationale: The correct action for the nurse to take in this situation is option B: Call the practitioner, report the client's symptoms, and obtain further orders. The client is displaying symptoms that indicate potential complications, such as internal bleeding, which require immediate medical evaluation. Option A is incorrect because the client's condition suggests a more urgent need for assessment. Option C is inappropriate as it does not address the seriousness of the client's symptoms. Option D is dangerous and could exacerbate any underlying issue the client may be experiencing.

Correct Answer: D

Rationale: Dry, brittle hair is a common sign of malnutrition, often seen in clients with anorexia nervosa. In anorexia nervosa, the body lacks essential nutrients due to severe calorie restriction, leading to dryness and brittleness of the hair. Choices A, B, and C are less likely to directly indicate anorexia nervosa. Preoccupation with calories can be a behavioral symptom, thick body hair is not a typical finding associated with anorexia nervosa, and a sore tongue is more commonly related to nutritional deficiencies like vitamin deficiencies rather than anorexia nervosa.