Page 2 of 2: physio mock test 50

Funckydoctor · Credits: 558 My Scrapbook

nice

vina · Credits: 172 My Scrapbook

i think its collecting duct
plz correct if am wrong

drsselvapriya · Credits: 1170 My Scrapbook

hi friends,

how can i join in mock test

plz let me know

deepaagicha · Credits: 302 My Scrapbook

finally got the ans

dbondM007 · Credits: 132 My Scrapbook

So whats the answer finally. Kindly give explanatio in short.

dr_bluebird · Credits: 328 My Scrapbook

Much of the filtered K+ is removed from the tubular fluid by active reabsorption in the proximal tubules , and K+ is then secreted into the fluid by the distal tubular cells. The rate of K+ secretion is proportionate to the rate of flow of the tubular fluid through the distal portions of the nephron, because with rapid flow there is less opportunity for the tubular K+ concentration to rise to a value that stops further secretion. In the absence of complicating factors, the amount secreted is approximately equal to the K+ intake, and K+ balance is maintained. In the distal tubules, Na+ is generally reabsorbed and K+ is secreted. There is no rigid one-for-one exchange, and much of the movement of K+ is passive. However, there is electrical coupling in the sense that intracellular migration of Na+ tends to lower the potential difference across the tubular cell, and this favors movement of K+ into the tubular lumen. Since Na+ is also reabsorbed in association with H+ secretion, there is competition for the Na+ in the tubular fluid. K+ excretion is decreased when the amount of Na+ reaching the distal tubule is small, and it is also decreased when H+ secretion is increased.

vivek_patel · Credits: 2561 My Scrapbook

so the ans is pct i suppose

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