5.3 Diffusion Flashcards

1
Q

diffusion def

A

net movment of particles from an area of high conc to area of lower conc
(down a conc gradient)
passive process

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2
Q

Factors that effect the rate of

diffusion

and there direction of influence

A
  • temp warmer=fster rate
  • conc differnece higher=faster rate
  • thickness of membrane thinner=faster
  • surface area larger=faster
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3
Q

facilitated diffusion

A

diffusion across membranse through channel proteins and can be carrier proteins too, still passsive

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4
Q

membranes with channel proteins are……. permeable

A

selectivley (most channels are specfict to on ion or molecule)

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5
Q

what can diffuse easily through the phospholipid bilayer?

A
  • small and non polar eg.
  • O2 CO2
  • H2O small enough despite being polar
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6
Q
A
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