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physics


Consider  a  single  pore,  with  a  radius  of  6  nm  and  length  50  nm  in  the  basement  membrane  in  a  kidney.  Assume  that  the  pressure  difference  across  the  membrane  is  1.4  kPa  and  the  viscosity  coefficient of the fluid passing through the pore is 1.5 × 10-3 N s/m2: (i)From this show that the volume flow rate through a single pore is 9.5 × 10-21 m2/s.  (ii)Given that 190 L of fluid is filtered by the kidneys each day, how many pores are in the kidneys?

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