Factors affecting rate of diffusion
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Transcript of Factors affecting rate of diffusion
F A C T O R S A F F E C T I N G T H E R A T E O F D I F F U S I O N
CELL MEMBRANE
Summary of Membrane Transport
Diffusion of Nonelectrolytes
Simple diffusion
Concentration Gradient (CA − CB)
Partition Coefficient (K)
Solubility of a solute in oil relative to its solubility in water
Diffusion Coefficient (D)
Size of the solute molecule
Viscosity of the medium
Thickness of the Membrane (ΔX)
The thicker the cell membrane, the lower the rate of diffusion.
Surface Area (A)
The greater the surface area of membrane available, the higher the rate of diffusion
Diffusion of Electrolytes
Facilitated Diffusion
Primary Active Transport
Secondary Active Transport
Cotransport
Countertransport
Saturation
Carrier proteins have a limited number of binding sites for the solute
Stereospecifity
The binding sites for solute on the transport proteins are stereospecific
Competition
Chemically related solutes can be recognized, bound, and get transport, thereby occupying some of the binding sites of other solutes
Reference:
Costanzo Physiology 5th edition