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Note that your final mark will not be saved in the system.
Biological membranes Categorise
Target Level
C
Running Total
0
0%
Attempt
1 of 3
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Simple diffusion
Facilitated diffusion
Active transport
Osmosis
Movement of charged ions and polar molecules down their concentration gradients
Example: transport of glucose
Able to occur anywhere along the phospholipid bilayer
Example: transport of oxygen
Movement of small, non-polar molecules
Involves the direct use of ATP and carrier proteins
Moves a substance against its concentration gradient
Movement of water from high water potential to low water potential
Example: sodium-potassium pump
Involves the use of carrier proteins and protein channels
A passive process that can only occur at certain points on the phospholipid bilayer
Movement across a partially-permeable membrane
Moves any substance down its concentration gradient