O explain what the following chart is illustrating

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o Explain what the following chart is illustrating: (Tip: Recall from section 2.2 the role of the N+/K+ ATPase transport pumps in reabsorption and what happens if they are over saturated.) On the vertical axis is the amount secreted in urine. On the horizontal axis is the amount reabsorbed into the blood. For more information, see these Video Resources: o Basic Renal Function: Clearance and GFR by Dr. Miller o Clearance of Wastes in Kidney – The Math by Macrophage Introducing Clearance: ? v=KGMOEo5iaG8&index=4&list=PLnab4uUuCkvJ7uzBz2xxxNq_sjZkQQ gcr Calculating Clearance: Measuring Clearance: Inulin and PAH: o The Nephron in Numbers: Renal Clearance by UofLPhysio: Page 2
BIO 265 7.3.2 - Urine Concentration and Dilution Describe how the Kidney concentrates and dilutes the urine. Study tip: Draw your own diagram of this process (or add to your concept map/Prezi) and teach what you have learned to a friend. o Explain the process of how the kidney adjust how much water is excreted or reabsorbed depending on hydration status. Using osmosis. When dehydrated, pulls water from tubule back into the blood (concentrated urine) and when overhydrated, lets water stay in the tubule (diluted urine). What parts of the kidney reabsorb water? About 15% reabsorbed in the descending limb of loop of Henle What parts of the kidney are impermeable to water? Ascending limb of loop of Henle Explain the purpose and function of the counter-current multiplier system in the kidney. o How is the Loop of Henle a counter-current multiplier? Since the two limbs are next two each other, one side moves ions and the other side allows water to follow the ion gradient generated. o How is the Vasa Recta a counter-current multiplier? It flows in a counter current to the filtrate and removes water from the interstitial space of the medulla to maintain the needed concentration gradient for the loop of Henle o Online Resources: Countercurrent Multiplication in the Loop of Henle: Kidney and the Counter Current Multiplier by Aston University: Khan Academy: - prep/mcat/organ-systems/the-renal-system/a/renal-physiology- counter-current-multiplication o Water wants to _________________ Na+/Cl- ions.

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