Halp

7.2 The permeability across a thin rectangular region of tissue is defined as Pi=C0CLNis, where C0 is the solute concentration in the blood, CL is the concentration in the lymph, and L is the thickness of the membrane. Assume that CL=0. (a) Use this definition and the flux across a membrane (when fluid flows across the membrane) (=1 ) to find an expression for the permeability in the presence of convective transport across the membrane. (b) Show that for diffusion-limited transport (Pe0), Pi=Dij/L. Note that exp(x)1+x for x