Which of the following clients is benefiting from the renin–angiotensin–aldosterone mechanism?
A) A teenager who received an injury to the flank area during football practice
B) A toddler who was recently diagnosed with cystic fibrosis
C) A college student admitted to the neurotrauma unit following traumatic brain injury requiring surgery to evacuate a large hematoma
D) A middle-aged adult with osteoarthritis requiring arthroscopic knee surgery to repair a torn meniscus
Ans: C
Feedback:
The kidney releases renin, which enters the blood stream to convert angiotensinogen to angiotensin I. The angiotensin I travels to the lungs, where it is converted to angiotensin II. Angiotensin II acts directly on the kidneys. Renin functions by means of angiotensin II to produce intrarenal vasoconstriction. This helps to regulate blood pressure, which could be a problem for the client having bleeding (hematoma) inside the brain.
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