Correct Answer: B

Rationale: Angiotensin II is the most potent compound in the renin-angiotensin-aldosterone system for raising blood pressure. It acts as a powerful vasoconstrictor, leading to increased systemic vascular resistance. Angiotensin II is formed from angiotensin I through the action of the angiotensin-converting enzyme. While renin initiates the cascade by converting angiotensinogen to angiotensin I, it is angiotensin II that exerts the strongest pressor effect.

Correct Answer: B

Rationale: The recommended sleep duration for adolescents aged 14-17 is 8-10 hours to promote optimal health. Getting enough sleep is crucial for their physical and mental well-being, as it supports growth, development, learning, and overall health.

Correct Answer: C

Rationale: Full analgesic effects can take up to 24 hours to develop with fentanyl patches. Most patches are changed every 72 hours. Has the same adverse effects as other opioids, including respiratory depression. Should avoid exposing the patch to external heat sources, because this may increase toxicity.

Correct Answer: B

Rationale: The nurse should instruct the parent to expose the infant's skin to air as it helps in promoting the healing process of diaper dermatitis by allowing the skin to breathe and reducing moisture, which can worsen the condition.

Correct Answer: C

Rationale: Hirschsprung disease is characterized by chronic, progressive constipation and failure to gain weight. These symptoms are indicative of the disorder due to the absence of ganglion cells in the distal colon, leading to impaired motility and obstruction.