5.3 Diffusion Flashcards
What is diffusion
The net movement of particles from a region of high to low concentration
What factors affect the rate of simple diffusion
TEMPERATURE
Higher temperature = ↑ Ek = ↑ rate of diffusion
CONCENTRATION GRADIENT
steeper concentration gradient = ↑ rate of diffusion
What factors affect the rate of diffusion across membranes
TEMPERATURE
Higher temperature = ↑ Ek = ↑ rate of diffusion
CONCENTRATION GRADIENT
steeper concentration gradient = ↑ rate of diffusion
SURFACE AREA
larger surface area = ↑ rate of diffusion
MEMBRANE THICKNESS
thinner membrane = ↑ rate of diffusion
In addition to temperature, concentration gradient, surface area & membrane thickness, what other factor affects the rate of facilitated diffusion?
Number of channel proteins available