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another one
The glomerular filtration rate:
A.is greater than 50% of the plasma flow to the glomeruli
B.falls to approximately 25% of normal when mean arterial pressure changes from 100
to 25 mm Hg
C.is decreased by a decrease in plasma colloid osmotic pressure
D.increases ipsilateral to a ureteral obstruction
E.none of the above statements are true
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Q 1 B. Filtration is a process driven by pressure differences between the glomerular capillaries
and Bowman's capsule. No active transport is involved. The glomerular membranes
are not permeable to high molecular weight substances like proteins. Amino acids and urea
are freely filtered substances and, as such, their concentration in Bowman's capsule will be
the same as in plasma.
Q2
Answer: E. Urethral obstruction will raise hydrostatic pressure in Bowman's capsule and
reduce GFR. Filtration in the contralateral nephrons will tend to increase as a compensatory
mechanism. Normally, GFR represents about 20% of the renal plasma flow. If
blood pressure decreases to 25 mm Hg, there will be little, if any, filtration.
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thanks drkap :-)
you are going good
I am wrong on first qs still I am happy as I think the way zkadhem thinks :-)
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looool ok here i go another q mis reading!!!!!!!! thx drkap.......
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pawan am i a standard?pls don't do that!!!!!!!!!loooool
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:-)
no no , nothing like that
when we are wrong we need company that is all :-)
but now i know it was your misread that u chose c
while i chose c after reading twice lollll
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LAST Q about GFR & FF
Sympathetic stimulation of the renal arterioles results in:
A.a greater percentage of filtrate being reabsorbed by the renal tubule
B.a decreased renal filtration fraction.
C.increased peritubular hydrostatic pressure in the kidney
D.an increased glomerular filtration rate