Active Transport Protein Pump Exocytosis Endocytosis CELL TRANSPORT

Active Transport Protein Pump Exocytosis Endocytosis

CELL TRANSPORT Passive Transport Active Transport • Diffusion • Osmosis – Hypotonic – Hypertonic – Isotonic • Facilitated Diffusion • Protein Pump (Sodium/Potassium) • Exocytosis • Endocytosis – Pinocytosis – Phagocytosis – Protein Channel copyright cmassengale 2

Active Transport Requires Energy (ATP) BECAUSE molecules are being FORCED from LOW concentration to HIGH concentration 3 Types: Protein Pump Exocytosis Endocytosis

Protein Pump • Forces small molecules and ions against the concentration gradient • Low to High concentration • Requires Energy (ATP) • Different from Protein Channel & Facilitated Diffusion • Example = Sodium-Potassium Pump

Video • http: //highered. mcgrawhill. com/sites/0072495855/student_view 0/ch apter 2/animation__how_the_sodium_potassi um_pump_works. html

Exocytosis Releasing Materials OUT of the Cell using vesicles Example: Proteins packaged by the Golgi

Endocytosis Bringing Materials INTO the Cell 2 Types: Pinocytosis & Phagocytosis

Pinocytosis (Endo) Bringing FLUID INTO the Cell using vesicles (mini-membranes) “Cell Drinking”

Phagocytosis (Endo) Bringing large SOLIDS (food, bacteria, etc. ) INTO the Cell using vesicles (mini-membranes) “Cell Eating”

Videos: Amoeba Feeding http: //www. youtube. com/watch? N R=1&v=a. WItglv. Ti. Lc White Blood Cell Chasing Bacteria http: //www. youtube. com/watch? v =Kx. TYy. NEb. VU 4&feature=related