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  #1  
Old 02-10-2013
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Arrow NBME Form 12 Discussion

Hey guys. In which of the following nephron parts is the greatest decrease in sodium resorption most likely.

What on earth does this mean? Are they asking us in which nephron part do we have the greatest resorption of sodium? Or are they asking us in which part of the nephron is sodium resorbed the least?
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Old 02-10-2013
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Hmmm... I think it means the latter, and the answer would be...descending limb of Henle's loop? :/
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Old 02-10-2013
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Quote:
Originally Posted by ballers View Post
Hey guys. In which of the following nephron parts is the greatest decrease in sodium resorption most likely.

What on earth does this mean? Are they asking us in which nephron part do we have the greatest resorption of sodium? Or are they asking us in which part of the nephron is sodium resorbed the least?
It's a fancy way of asking which part is impermeable to solute (NaCl) that would be the descending limb of the loop.
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Quote:
Originally Posted by ballers View Post
Hey guys. In which of the following nephron parts is the greatest decrease in sodium resorption most likely.

What on earth does this mean? Are they asking us in which nephron part do we have the greatest resorption of sodium? Or are they asking us in which part of the nephron is sodium resorbed the least?
in proximal tubules
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Old 02-10-2013
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Quote:
Originally Posted by eveli55 View Post
in proximal tubules
I'm sorry your statement is wrong . they are asking where the greatest "decrease in sodium re-absorption" occurs and it's is definitely not the PCT.
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Old 02-10-2013
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Quote:
Originally Posted by obinocle View Post
It's a fancy way of asking which part is impermeable to solute (NaCl) that would be the descending limb of the loop.
youre right! since only water is reabsorbed there!
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Originally Posted by obinocle View Post
I'm sorry your statement is wrong . they are asking where the greatest "decrease in sodium re-absorption" occurs and it's is definitely not the PCT.
My answer was correct on nbme.
The proximal tubules resabsorbs ~66% of the filtrate via secondary active transport. The question is answered just based on percentages. The DCT is provides 5-10% and the TAL provides 15-20% of sodium reabsorption. The greatest decline in sodium reabsorption would come from poisoning the PCT.
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Quote:
Originally Posted by obinocle View Post
My answer was correct on nbme.
The proximal tubules resabsorbs ~66% of the filtrate via secondary active transport. The question is answered just based on percentages. The DCT is provides 5-10% and the TAL provides 15-20% of sodium reabsorption. The greatest decline in sodium reabsorption would come from poisoning the PCT.
Then why on earth would they say "greated decrease in sodium reabsorption" and not simply "greatest sodium reabsorption"
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don't listen. watever the dude's saying is not correct. check it out for yourself.
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Old 05-09-2013
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Default biostatistic doubt

4753 nulliparous preganat women wer randomised to folic acid and trace element supplementation.in both grup 88% pregnancies ended in live birth, stilbirth, termination of preg or late fetal death after prenatal diagnosis of defect.following are pregnancy outcomes:
NEURAL TUBE DEFECT- folic acid(0%), trace element(0.29%)
ALL CONG. ANOMALIES- folic acid(1.3%), trace-(2.3%)
use trace element gr as control gp, how many nulliparous women have to be treated wid folic acid to prevent congenital anomalies?

1- 0.29
2- 2.3
3- 100
4- 344
5- 4756
6- 120
7- 80
8- 0
9- 1.3
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