Presentation on theme: "Cell Transport Semipermeable membrane – small, lipid-soluble particles can pass, but large, charged particles cannot Diffusion – net movement of particles."— Presentation transcript:
1 Cell TransportSemipermeable membrane – small, lipid-soluble particles can pass, but large, charged particles cannotDiffusion – net movement of particles from high to low concentrationConcentration gradient – the difference in concentration between one area and another
4 Osmosis Diffusion of water through aquaporins Moves from high water potential to low water potential.Hypertonic solution – higher solute concentrationHypotonic solution – lower solute conc.Isotonic soln. – solute conc. Equal on both sides and equilibrium.
8 Active Transport Not passive Goes up or against the concentration gradient (needs energy)Na+ out/K+ inInvolves specific carrier proteinsImportant in muscle contractions, nerve impulses – maintains resting potentialEx. Plant roots, ion pumps