Correct Answer: B

Rationale: The correct answer is B: a normal serum creatinine level. In renal insufficiency, the kidneys are not able to filter waste products effectively, leading to an increase in serum creatinine levels. This is a common indicator of renal dysfunction. A: An increased GFR would not be expected in renal insufficiency, as it signifies improved kidney function. C: Increased ability to excrete drugs is not a typical finding in renal insufficiency, as impaired kidney function can lead to drug accumulation. D: Hypokalemia is not directly related to renal insufficiency. It is more commonly associated with factors like diuretic use or gastrointestinal losses.

Correct Answer: B

Rationale: The correct answer is B because an increase in heart rate and respiratory rate can be a normal response before body system functions decrease in a hospice patient. This is known as a compensatory mechanism as the body tries to maintain oxygenation. Choice A is incorrect because symptoms may not always continue to increase until death. Choice C is incorrect as it implies a reflex response, which may not be the case. Choice D is incorrect as an improvement in the patient's condition is unlikely in a hospice setting.

Correct Answer: B

Rationale: The correct answer is B: A deep vein thrombosis from lower extremities. Deep vein thrombosis (DVT) is the most common cause of a pulmonary embolus as a blood clot can dislodge from the veins, travel to the lungs, and block blood flow. An amniotic fluid embolus (Choice A) occurs during childbirth and is rare as a cause of pulmonary embolism. A fat embolus (Choice C) typically occurs after a long bone fracture and is more likely to cause issues in the lungs. Vegetation from an infected central venous catheter (Choice D) can cause septic pulmonary embolism, but it is not as common as DVT.

Correct Answer: A

Rationale: The correct answer is A because breastfeeding helps stimulate the uterus to contract, which reduces the risk of postpartum hemorrhage in the mother. When the baby suckles at the breast, it triggers the release of oxytocin, a hormone that causes the uterus to contract. This contraction helps the uterus to return to its pre-pregnancy size and shape, promoting faster healing and reducing bleeding. Choice B is incorrect because lactation initiation is a separate process that involves hormonal changes and milk production, which may not occur immediately after delivery. Choice C is incorrect as bonding can occur through various interactions beyond breastfeeding. Choice D is incorrect as neonatal hypoglycemia is primarily prevented by ensuring the baby receives adequate nutrition, which can also be achieved through other feeding methods besides breastfeeding.

Correct Answer: D

Rationale: The correct answer is D because positive end-expiratory pressure (PEEP) is a mode of ventilation where pressure is maintained in the lungs at the end of expiration. This helps prevent alveolar collapse and improves oxygenation. Option A is incorrect because PEEP does not deliver a full preset tidal volume with each breath initiation. Option B is incorrect because tidal volume in PEEP is not solely determined by the patient's ability to generate negative pressure. Option C is incorrect because in PEEP, breaths are delivered irrespective of the patient's respiratory drive.