Ch6%20Study%20Guide

Ch6%20Study%20Guide - MCB3209 Chapter 6, Membrane transport...

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MCB3209 Chapter 6, Membrane transport of solutes, water and ions by diffusion, mediated transport, active transport, secondary active transport, filtration and osmosis. Generation of voltages. pp. 128-137, 140-145, 146-150 Study Guide Define or describe: extracellular, intracellular, interstitial, plasma; facilitated diffusion (uniport) for glucose; cotransport (symport) for glucose and Na in intestinal epithelial cells; exchange (antiport) for Cl and HCO 3 in red cells; ion channels for Na + and K + that are gated by voltage; Na/K-pump (ATPase); the role of K channels and the Na/K pump in generating a membrane voltage. Distinguish between diffusion and osmosis; equilibrium vs. steady state for ions inside cells; primary vs. secondary active transport Use the Nernst equation to approximate the magnitude and sign (inside negative or positive) of membrane voltage in presence of ion concentration gradients. Membrane voltage will be closest to the Nernst potential of the most permeant ion. 1. T-F? Cell voltage is negative inside because there are more cations (positively charged ions) outside the cell than inside. 2. T-F? Carrier proteins transport molecules across membranes at a fixed rate called saturation rate.
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Ch6%20Study%20Guide - MCB3209 Chapter 6, Membrane transport...

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