ACTIVE transport!.

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Presentation transcript:

ACTIVE transport!

What is it? Molecules move “up” concentration gradient LOW HIGH Ion channels, carrier proteins act like pumps

What happens? Molecule binds to specific protein Protein changes shape Protein transports molecule

Where do cells get the energy? Directly or indirectly from ATP(THE energy molecule)!! adenine Phosphate groups 5 – carbon sugar

Example: Sodium-Potassium Pump Keep balance of sodium and potassium ions 3 Na+ out, 2 K+ in Cystic fibrosis is a disease resulting from faulty pump

Movement in Vesicles Large molecules require help Two Types: Endocytosis – ingest fluids & macromolecules from outside cell Pinocytosis – solutes and fluids Phagocytosis –large particles Animation

Exocytosis - vesicle fuses with membrane and releases contents to outside

Transport Review 

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