Correct Answer: C

Rationale: The correct answer is 4.0 mEq/L. Normal serum potassium levels typically range from 3.5-5.5 mEq/L. Choice A (1.5 mEq/L) is below the normal range, Choice B (3.0 mEq/L) is also below the normal range, and Choice D (6.0 mEq/L) is above the normal range. Therefore, the only option within the normal range is Choice C (4.0 mEq/L).

Correct Answer: C

Rationale: Rifampin has the unusual effect of turning body fluids an orange color. Soft contact lenses might become permanently stained. Clients should be taught about these side effects to avoid unnecessary concern. Option A is incorrect as Rifampin does not cause the urine to turn blue. Option B is incorrect as the client is not infectious to others due to taking Rifampin for prophylaxis. Option D is incorrect as Rifampin does not cause the skin to take on a crimson glow.

Correct Answer: D

Rationale: The correct answer is 'policies and procedures.' While policies and procedures are important for guidance and structure, they do not inherently involve ethical or moral considerations. The emotional impact on the client and family, the dignity of the client, and the client's quality of life are all directly related to ethical and moral concerns when it comes to the use of restraints. These factors are crucial in ensuring that the use of restraints is not only physically necessary but also ethically justifiable and respects the individual's rights and well-being. Therefore, options A, B, and C are all aspects that touch upon ethical and moral dimensions in the context of restraints.

Correct Answer: D

Rationale: The correct answer is 'sunburn from lack of protection and overexposure.' First-degree burns primarily affect the outer layer of the skin and are commonly caused by overexposure to the sun without adequate protection, making it a significant concern for parents of small children. Choices A, B, and C describe other types of burns (scalding, contact with hot surfaces, and contact with flammable substances) that can cause more severe burns beyond the first-degree level. It is crucial for parents to be educated about sun safety measures to prevent sunburns in children.

Correct Answer: A

Rationale: Coma is a sign that a nurse might observe in a client with a high ammonia level. Elevated ammonia levels can lead to hepatic encephalopathy, a condition characterized by impaired brain function, which can progress to coma. Edema (choice B) is swelling caused by excess fluid trapped in body tissues, not typically associated with high ammonia levels. Hypoxia (choice C) is a condition of inadequate oxygen supply to tissues and is not directly related to high ammonia levels. Polyuria (choice D) refers to excessive urination and is not a typical sign of high ammonia levels.