Simple diffusion &t gap junctions [High [LoW Ca++
Simple diffusion & gap junctions
Facilitated diffusion Carrier-mediated Intracellular fluid Binding site Extracellular fluid Transporter Transported protein solute
Facilitated Diffusion ▫ Carrier-mediated
Simple diffusion Facilitated diffusion Characteristics of carrier-mediated diffusion net movement always depends on Concentration of S outside cel the concentration gradient Specificity Saturation When S1 is alone Competition In presence of $2 Concentration outside cel
Characteristics of carrier-mediated diffusion net movement always depends on the concentration gradient ▫Specificity ▫Saturation ▫Competition
Channel-mediated Copyrighte The McGraw a Componies, Inc, Permission required tor reproduction cr os round for re 3 3 cartoon models of Copyright e The McGraw-Hill Companies, Inc. Permission required for reproduction or display on channel integral membrane proteins that function as ion channels: the regulated opening and closing of these channels is Cross section the basis of how neurons function queous pore of ion channel
– Channel-mediated 3 cartoon models of integral membrane proteins that function as ion channels; the regulated opening and closing of these channels is the basis of how neurons function
Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display Intracellular fluid Channel proteins Lipid bilayer Open ion channel Closed ion channel Extracellular fluid The opening and closing of ion channels results from conformational changes in integral proteins Discovering the factors that cause these changes is key to understanding excitable cells
The opening and closing of ion channels results from conformational changes in integral proteins. Discovering the factors that cause these changes is key to understanding excitable cells