BIPN10021 - Dwayne Chang [email protected] OH Wed 12:30P...

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Dwayne Chang [email protected] OH: Wed 12:30P @ Leichtag Lobby Professor:  Dr. Fortes  BIPN 100 Winter 2008 Week 1/2 – Diffusion, Transport, and Neurons I. Diffusion a. Properties of Diffusion i. Why do cells need diffusion? - - ii. How does flow via diffusion go, or what is the default gradient? _____________ -> _____________ b. Fick’s Law i. Equation: ____ / ____ = ________ x ________x Permeability 1. For each case, state how the noted change affects permeability a. ___ Increase lipid solubility b. ___ Decrease in size c. ___ Increase in viscosity d. ___ Decrease in thickness c. Practical You are experimenting with the diffusion of Molecule A across a membrane. Which of the following changes will yield the greatest increase in net flow of Molecule A? a. Inc. membrane surface area by a factor of 4 b. Dec. membrane thickness by a factor of 6
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Dwayne Chang [email protected] OH: Wed 12:30P @ Leichtag Lobby Professor:  Dr. Fortes  BIPN 100 Winter 2008 c. Dec. molecule size by half d. Both (a) and (c) would yield the same increase e. None of these, these would all decrease net flow II. Transport
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