Biology - Passage Through Membranes
Passage Through Membranes
Membranes have selective control over the movement of materials into and
out of cells.
Lipid-soluble molecules (e.g. chloroform, alcohol) - dissolve in the
Polar molecules and ions - pass through the membrane via protein
channels, which are water-filled pores.
Small uncharged particles (e.g. molecules of O2 and CO2 ) - pass through
Small water-soluble molecules (e.g. urea, water) - pass through pores
between lipid molecules.
Larger water-soluble molecules (e.g. amino acids , simple sugars) -
pass through the membrane via protein channels.
View the video of the formation of a solution (solute + solvent)
Click for the Method of passage through membranes document.
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