[ANIMAL PHYSIOLOGY] A scientist interested in studying aquaporins plans to examine the different parts of mammalian nephrons in which large numbers of aquaporins can be found. This researcher would NOT choose to examine the. Select one: O a. proximal convoluted tubule. b. thick ascending limb of the loop of Henle. OC. descending limb of the loop of Henle. o d. distal convoluted tubule. O e. collecting duct.

Explain how the cycling of sodium chloride between the descending and ascending limbs of the loop of Henle in the mammalian kidney, and special permeability of these tubules, produces high osmotic concentrations in interstitial fluids in the kidney medulla. Explain the role of urea in producing high osmotic concentrations in the intersti-tial fluid of the medulla.

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In what ways does the nephridium of an earthworm parallel the human nephron in structure and function?