The counter current multiplier system A. Is found in the collecting duct B. Is a

Question

The counter current multiplier system A. Is found in the collecting duct B. Is assisted by hormones. C. Has fluid flowing in parallel tubes in opposite directions. D. Maintains the solute concentration of the medullary interstitial fluid. E. Both C and D The phosphate buffer system deals with decreased plasma pH due to hypercapnia prevents the change in pH due to rising metabolic acids in the blood is the only buffer that prevents changes in pH caused by the addition of akaline molecules absorbs secreted hydrogen ions during the creation of urine. Mr. Smith hypoventilates and retains too much carbon dioxide. Which of the following receptors is stimulate Baroreceptors

Explanation / Answer

3) Both C and D

Its a mechanism for reabsorbing water from the tubular fluid and mechanism is in both the loop of Henle and the vasa recta.

4) Answer is B : prevents change in pH due to rising metabolic acids in the blood

Dihydrogen phosphate ions acts as hydrogen-ion donor (acid) and hydrogen phosphate ions acts as hydrogen-ion acceptor (base). So it maintains the pH at both higher acidic and higher alkaline conditions. It eliminates excess hydrogen ions when the environment is acidic and accepts hydrogen ions when the environment is alkaline. It is not the only buffer to maintain pH, there is also carbonate buffer system to maintain pH.

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