Question

he ability to concentrate urine is tightly linked to the countercurrent system between nephron and blood vessels in the medulla. What predictions can you make about the concentration gradient if the system were concurrent? Please explain why you make these predictions

Answer 1

here is the reason of concentrate urine tightly inled to the counter current system as below.....

• long loop of Henle estblishesba vertical osmotic gradient .
• If the loop of henle is concurrent then the osmotic gradient doesn't generat between the loop of Henle.
• theri vasa recta preserve this gradient whipe providing blood to renal medula is called counter current exchange of ions.
• ​​​​​​if we predicte that councurrent then the pressure couldn't be geneart and the ions like Na+ and other can not be transformed... In to the medula
• in other hand collecting duct of nephron use the gradient with the help of hormone to produce urine of varying conc.
• A large, verticle pressure is generated in the intestinal fluid of the medulla
• active transport of Na and Cl out of thick ascending limb...
• High permeability of thin descending limh to water .
• Solute deposition in medulla and removal of water from descending limb

DEVELOPMENT OF THE MEDULLARY GRADIENT is the main reason for the counter current system .its helps to easily concentrate the urine by this process.

IN THE CONCURRENT SYSTEM

• doesnot generat this medullary grdient
• Axial gredient can't be geneart
• This is depends on the
• rate of fluid
• Strength of single effect
• Length of henle
• This all factor is also depends on the counter current
• sloute gredient created by Loh in medulla is mentioned by vasa recta
• Decrease salute dissipation
• Thus sloutes are circulating

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