Sympathectomy of the kidney results in which of the following responses?
Correct Answer: Increased urine output
Description: The kidney is innervated primarily by the sympathetic nervous system and as such, regulates the contraction of the smooth muscle surrounding the afferent and efferent aerioles of the glomerulus. Sympathetic stimulation to the efferent glomerular aerioles causes the constriction and increases the filtration rate, leading to an increase in urinary output. Similarly, with the loss of sympathetic innervation, such as due to sympathectomy of the kidney, relaxation of tone of the afferent aerioles occurs and the filtration rate increases which results in an increased urine output. Decreased urine output may result from the restriction of the afferent aerioles, leading to a decrease in glomerular filtration rate. Ref: Eaton D.C., Pooler J.P. (2009). Chapter 1. Renal Functions, Anatomy, and Basic Processes. In D.C. Eaton, J.P. Pooler (Eds), Vander's Renal Physiology, 7e.
Category:
Physiology
Get More
Subject Mock Tests
Practice with over 200,000 questions from various medical subjects and improve your knowledge.
Attempt a mock test nowMock Exam
Take an exam with 100 random questions selected from all subjects to test your knowledge.
Coming SoonGet More
Subject Mock Tests
Try practicing mock tests with over 200,000 questions from various medical subjects.
Attempt a mock test now