Specialised Exchange Systems Flashcards
1
Q
Ficks Law
A
Rate of diffusion is proportional to surface area and concentration difference and inversely proportional to the thickness of the membrane
(SA x concentration gradient) / thickness of membrane
2
Q
Surface area
A
As surface area increases the rate of diffusion also increases as there are more places for diffusion to happen faster
3
Q
Concentration gradient
A
The larger the concentration gradient, the faster the rate of diffusion
4
Q
Thickness of membrane
A
The thicker the membrane, the slower the rate of diffusion as the diffusion distance is greater
5
Q
Surface area to volume ratio
A
Surface area / volume
6
Q
As bacteria are so small, gas exchange…
A
Occurs through the cell wall
