MEMBRANE TRANSPORT WORKSHEET ONE

Largest d and diffuse most readily b smallest d and

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Unformatted text preview: 6 π r η D = DIFFUSION COEFFICIENT K = Boltzmann’s constant T = Absolute temperature r = MOLECULAR RADIUS η = VISCOSITY The DIFFUSION COEFFICIENT (D) depends on: size of the solute (r) and viscosity of the medium (η) The diffusion coefficient correlates inversely with the molecule radius (r) of the solute and the viscosity of the medium (η) APPLICATION: 1. Small solutes in nonviscous solutions will have the: a. Largest D and diffuse most readily b. Smallest D and diffuse least readily 2. Large solutes in viscous solutions will have the: a. Largest D and diffuse most readily b. Smallest D and diffuse least readily 4. THICKNESS OF THE MEMBRANE (Δ X) • The thicker the membrane, the greater the distance the solute must diffuse, the lower the rate of diffusion 5. SURFACE AREA (A) • The greater the surface area of membrane available, the higher the rate of diffusion Student Academic Resource Center Tutor: Sarah PCB3703 Human Physiology SPRING 2013 MEMBRANE TRANSPORT WORKSHEET ONE • To simplify the description of diffusion, several previously mentioned factors can be combined into a single term called PERMEABILITY (P...
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