The main function of the loop of Henle is to
Correct answer: A. establish a salt gradient in the medulla that allows urine to be concentrated
- A. establish a salt gradient in the medulla that allows urine to be concentrated
- B. filter the blood
- C. secrete hormones
- D. store urine before release
Explanation
By pumping salt out of its ascending limb, the loop builds a concentrated medulla that draws water out of the collecting duct. The longer the loop, the more concentrated the urine, which is why desert mammals have such long ones.
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About Kidney and Urinary System
The kidney and urinary system remove nitrogenous wastes, regulate water and ion balance, and help maintain blood pH through filtration, selective reabsorption and secretion. Questions cover nephron structure, ultrafiltration, the loop of Henle, collecting ducts, urine formation and the roles of ADH and aldosterone, while distinguishing excretion from egestion.
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