5.3 Diffusion Flashcards

1
Q

What is diffusion

A

The net movement of particles from a region of high to low concentration

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2
Q

What factors affect the rate of simple diffusion

A

TEMPERATURE
Higher temperature = ↑ Ek = ↑ rate of diffusion

CONCENTRATION GRADIENT
steeper concentration gradient = ↑ rate of diffusion

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3
Q

What factors affect the rate of diffusion across membranes

A

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

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4
Q

In addition to temperature, concentration gradient, surface area & membrane thickness, what other factor affects the rate of facilitated diffusion?

A

Number of channel proteins available

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