Paasive Transport Flashcards
Factors affecting rate of diffusion
Concentration gradient: diffusion rates will be higher if difference is
Distande
Area-larger area, greater rate
Barriers-thicker barriers slow diffusion rate
Diffusion
Movement of molecules from high to low concentration.
Fick’s Law
(Surface Area•diff in concentration across membrane)/length of difficult path (thickness of membrane
Carrier mediated facilitated diffusion
Used for?
Transmembrane CP specific to molecule
Glucose
Channel mediates facilitated diffusion. Used for?
Hydrophilic Pores that allow inorganic ions to pass through
Small polar molecules and ions
Water always diffuses from - to - solute concentration
Low to high
Hypotonic
Water concentration is higher than cell
Hypertonic
Water concentration is lower than the cell (plants like this)
Isotonic
Concentrations are equal