Membrane Structure & Transport functions
A set to help revision of membrane parts and functions for IB Biology students
Terms in this set (12)
A molecule with hydrophilic phosphate & hydrophobic lipid regions
A double layer of phospholipids that makes up a plasma membrane
A protein embedded in the lipid bilayer of a membrane. e.g. protein channels, or pumps.
A protein attached to the surface of a membrane
A steroid present in the plasma membranes of animal cells. It affects membrane fluidity.
Some substances pass through the membrane but not others.
The passive movement of molecules from an area of high concentration to an area of lower concentration.
The passive movement of water through a selectively permeable membrane
A difference in the concentration of a substance across a space
Passive transport of ions or polar molecules across a membrane by protein channels
Movement of a substance through a cell membrane against the concentration gradient; requires energy.
A protein that uses ATP to transport ions against the concentration gradient by active transport.