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Cell Biology - Class 02
The in-depth study of human cells
By: David Botton

Membrane Physiology

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Membrane Physiology

carriers

use ion gradient as energy to drive transport

pumps

establish electrochemical gradient

general

chemiosmotic cycle

a symporter carrier brings in two chemicals

one draws in water when entering

a pump is then turned on to flush out the one that draws water

this prevents over hydration

epithelial transport

apical - surface exposed to lumen

basolateral - the side towards interstitial space and blood

process of transport of substrates through apical surface out basolateral side

that process through top symporter that drew in Sodium is then pumped out

potassium is balanced through a channel and leakage

channels

regulate membrane permeability


(c) 2005 All Rights Reserved - David Botton