Question

In space below, explain in what direction the ions of Ya^ + * K^ + , CI , P,Ca^ 2+ move and denote in which section(s) of the kidney tubules this movement occurs. Be sure to tell if the movement is active or passive (3p / s)

Answer 1

Just go through this table.

Substance PCT Loop of Henle DCT Collecting ducts Almost 100 percent Glucose reabsorbed; secondary active transport with Na Oligopeptides, Almost 100 percent proteins, amino reabsorbed; symport with acids Nat Vitamins Reabsorbed Lactate Reabsorbed Creatinine Secreted Urea 50 percent reabsorbed by Secretion, diffusion in diffusion; also secreted (descending limb Reabsorption in medullary collecting ducts; diffusion 5 percent reabsorbed, stimulated by aldosterone; active Sodium 65 percent actively reabsorbed 5 percent reabsorbed; active 25 percent reabsorbed in thick ascending limb; active transport Reabsorbed in thin and thick ascending limb; diffusion in ascending limb Chloride Reabsorbed, symport with Na+, diffusion Reabsorbed; diffusion Reabsorbed; symport Water 67 percent reabsorbed osmotically with solutes 15 percent reabsorbed in descending limb; osmosis 8 percent Variable amounts reabsorbed if reabsorbed, ADH; controlled by ADH, osmosis osmosis Bicarbonate 80–90 percent symport reabsorption with Nat Reabsorbed, symport with Nat and antiport with cl; in ascending limb Reabsorbed antiport with cr Secreted; diffusion NH4+ Secreted; diffusion Secreted; Secreted; active active Secreted; diffusion Secreted; diffusion Reabsorbed; Reabsorbed; antiport diffusion with Nat Secreted; Secreted; active active HCO3 Reabsorbed; diffusion Reabsorbed; diffusion in ascending limb Some drugs Secreted Potassium 65 percent reabsorbed; diffusion 20 percent reabsorbed in thick ascending limb; symport Secreted; active Secretion controlled by aldosterone; active Calcium Reabsorbed; diffusion Reabsorbed in thick ascending limb; diffusion Reabsorbed if parathyroid hormone present; active Magnesium Reabsorbed; diffusion Reabsorbed in thick ascending limb; diffusion Reabsorbed Phosphate 85 percent reabsorbed, inhibited by parathyroid hormone, diffusion Reabsorbed; diffusion