Cell Theory 1. All organisms are composed of one or more cells.
Cells are alive and are the smallest living unit.
All cells come from other cells. Gradients and D G's of gradients Unequal distribution of molecules across the membrane Molecule tend to move from high concentration to a low concentration process of diffusion Osmosis a specialized case of diffusion of water high conc. No added energy required must follow the gradient Simple Diffusion Smaller, nonpolar and uncharged are better Works for water, oxygen and carbon dioxide, lipids Doesn't work for ions, sugars, proteins, amino acids etc. Electron Transport red. Electron Transport red.