Excretory Products And Their Elimination Ques 41
41. The net pressure gradient that causes the fluid to filter out of the glomeruli into the capsule is:
(a) $50 mm Hg$
(b) $75 mm Hg$
(c) $20 mm Hg$
(d) $30 mm Hg$
Show Answer
Answer : c
Hints & Solutions
(c) (i) Glomerular capillary pressure $(45 mm$ $Hg$ ) favours filteration. (ii) The colloidal osmotic pressure (due to plasma proteins, particularly albumin) acts against filteration. Its value is $\sim 20 mmHg$. (iii) The filterate pressure due to the glomerular filterate filled in the Bowman’s capsule also acts against filteration. Its value is $\sim 10 mmHg$ Net filteration pressure $=45-(20+10) mm Hg$ $=15 mm$ of $Hg(10-20 mm$ of $Hg)$
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