Correct Answer: B

Rationale: The correct answer is B. Reducing fluid intake before bedtime helps prevent interruptions in sleep due to bathroom visits, which is crucial for individuals with insomnia. Taking naps throughout the day (choice A) may disrupt nighttime sleep. Drinking coffee (choice C) is counterproductive as it contains caffeine, which can interfere with falling asleep. Increasing screen time before bed (choice D) can negatively impact sleep quality due to the stimulating effects of screens.

Correct Answer: A

Rationale: The correct answer is to assess blood pressure first. Losartan is an angiotensin receptor blocker used to lower blood pressure. Assessing the patient's blood pressure before administering losartan is crucial to ensure it is not already too low, which could lead to hypotension. Assessing heart rate (choice B) is important but not the priority when administering losartan. Serum potassium levels (choice C) and liver function (choice D) are also important assessments, but they are not the primary concern before administering losartan.

Correct Answer: D

Rationale: Clients with renal failure are at risk for electrolyte imbalances and hypertension. Monitoring electrolyte levels is crucial because renal failure can lead to imbalances in sodium, potassium, and other electrolytes. Blood pressure monitoring is essential as hypertension is a common complication of renal failure. Therefore, both electrolyte levels and blood pressure should be closely monitored to detect and manage any abnormalities. Fluid intake, while important, is not specific to renal failure monitoring and is not the priority in this case.

Correct Answer: A

Rationale: The nurse should assess the client with a fractured femur and sharp chest pain first. Sharp chest pain in this client may indicate a pulmonary embolism, a life-threatening condition requiring immediate attention. The other options describe important patient conditions but do not pose an immediate threat to life like a potential pulmonary embolism does.

Correct Answer: C

Rationale: The correct answer is C: Acquired immunity. Acquired immunity occurs when an individual is given a vaccine or immunization to develop antibodies. This type of immunity is specific and develops after exposure to an antigen. Innate immunity (choice A) is the body's natural defense system present at birth. Passive immunity (choice B) is temporary immunity passed from one individual to another. Natural immunity (choice D) refers to immunity that is not gained through medical intervention or deliberate exposure.