Question

Which of the following would not be expected to increase urine output? A. inhibition of sodium...

Which of the following would not be expected to increase urine output?

A. inhibition of sodium potassium ATPase in the collecting duct

B. an increase in vasopressin (antidiuretic hormone) levels

C. increasing blood pressure

D. reduced reabsorption of fluid by the proximal tubule

Science   Anatomy-And-Physiology   
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Answer #1

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Option B) An increase in vasopressin (antidiuretic hormone) levels

  • Vasopressin (antidiuretic hormone) is secreted from posterior pituitary gland.
  • It functions to increase aquaporin channel concentration in thw walls of collecting ducts.
  • Aquaporins facilitate water reabsorption.
  • As antidiuretic hormone enhance reabsorption of water from the filtrate, increase in the amount of this hormone will reduce the amount of urine produced.
  • Hence, Increase in vassopressin would NOT be expected to increase urine output.
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