nbme...... - poojy36

[ArchivalUser]

1..patient has rt sided renal artery stenosis ..lab finding that best predicts whether an operation will reduce BP to normal is increased renin activity in

a)lft renal art more than rt renal art
b)lft renal vein more tahn rt renal vein
c)rt Ra more that lft RA
d) rt RV more that Lft RV

2)delta g0 values


delta g0
V------W -4
W------X +0.4
X-------Y -3.4
Y-------Z +5.7

WHICH COMPONENT IN THE OWERALL PATHWAY V---W---X---Y---Z WILL ACCUMULATE AT EQUILIBRIUM?

A)V
B)W
C)X
D)Y
E)Z
(i HAVE NO CLUE HOW TO ANSWER THIS..PLS HELP WITH AN EXPLANATION..THANKS)

[ArchivalUser]

rt RV more that Lft RV

[ArchivalUser]

i think left renal vein more then right renal vein,
E) y-----z as the max delta value is 5.7

[ArchivalUser]

can u explain plz

[ArchivalUser]

i think rt vein more because since there is rt renal artery stenosis ===> decrease blood flow to rt kidney (juxta glomerular aparatus) which respond by secreating renin ...

[ArchivalUser]

and the renin secretion by the left kidney is low cos of negative feedback

[ArchivalUser]

Mumbaidoc has a good explanation on the 1st one.

http://www.usmleforum.com/forum/message.php?id=63775