Correct Answer: A

Rationale: The correct answer is A: Myasthenia gravis. Myasthenia gravis is characterized by muscle weakness caused by autoimmune attack on acetylcholine receptors at the neuromuscular junction. This results in impaired communication between nerves and muscles. Choice B, Multiple sclerosis, is a condition where the immune system attacks the protective myelin sheath covering the nerves in the central nervous system, leading to communication issues between the brain and the rest of the body. Choice C, Amyotrophic lateral sclerosis, is a progressive neurodegenerative disease affecting motor neurons in the brain and spinal cord, not involving acetylcholine receptors. Choice D, Guillain-Barr© syndrome, is an acute condition where the immune system attacks the peripheral nerves, causing muscle weakness and paralysis, but it does not target acetylcholine receptors.

Correct Answer: C

Rationale: The correct answer is C, Rifabutin. Rifabutin is actually a first-line drug used in the treatment of tuberculosis. Choices A, B, and D (Amikacin, Moxifloxacin, and Cycloserine) are considered second-line agents for tuberculosis treatment. These drugs are used when the first-line medications are either ineffective or cannot be tolerated by the patient.

Correct Answer: C

Rationale: During a fire emergency, the most critical task for the PN is to identify the method for transporting and evacuating each resident. This task ensures a safe and organized evacuation plan, which is essential for everyone's safety. Delegating this responsibility to an unlicensed assistive personnel (UAP) may lead to errors or delays in the evacuation process. Closing doors to residents' rooms (Choice A) can help contain the fire but is not as urgent as planning the evacuation. While offering comfort and reassurance (Choice B) is important, it should not take precedence over ensuring a safe evacuation. Providing blankets (Choice D) is helpful but does not directly address the primary concern of safely evacuating residents.

Correct Answer: D

Rationale: Measuring vital signs is crucial in this situation as it helps to determine if the client is experiencing a physical health issue or if the symptoms are related to a mental health crisis, such as anxiety or agitation. The presence of diaphoresis and pacing may indicate physiological changes requiring immediate attention. Providing a drink high in electrolytes or persuading the client to lie down may not address the underlying cause of the symptoms. Simply observing the client during the shift without taking necessary actions to assess his physiological status may delay appropriate intervention.

Correct Answer: A

Rationale: The correct answer is to ask the client's reason for choosing to take herbs instead of prescribed medication. Understanding the client's rationale for using herbal supplements allows the nurse to explore any misconceptions and provide education on the importance of the prescribed medication. Choice B is incorrect because simply reinforcing the prescription does not address the client's concerns or reasons for using herbal supplements. Choice C does not directly address the immediate concern of the client substituting medication with herbal supplements. Choice D focuses on the risks of not taking the prescribed medication rather than herbal supplements, which is not the most appropriate initial response.