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Active transport

Active transport. Active Transport. Defined : Molecules move from a LOW to a HIGH concentration Against (up) the concentration gradient ATP energy opens/closes protein channel ATP = Adenosine Triphosphate Acts like a pump for ions. Contractile vacuole of a Paramecium. Endocytosis.

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Active transport

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  1. Active transport

  2. Active Transport • Defined: Molecules move from a LOW to a HIGH concentration • Against (up) the concentration gradient • ATP energy opens/closes protein channel • ATP = Adenosine Triphosphate • Acts like a pump for ions

  3. Contractile vacuole of a Paramecium

  4. Endocytosis • Endocytosis: Process in which the plasma membrane takes in substances (2 types) • 1) Phagocytosis: when a cell engulfs a solid particle • WBCs are called phagocytes • 2) Pinocytosis: when a cell engulfs a liquid particle • Unfortunately, viruses can also enter our cells this way

  5. Endocytosis & the lysosome The bacteria is engulfed by phagocytosis The bacteria is placed inside a lysosome are destroyed

  6. Amoeba and endocytosis

  7. Exocytosis • Defined: Process when substances are expelled from the cell • Proteins, nutrients, and waste exit by exocytosis • Vesicle carry & release objects through the plasma membrane

  8. Kobe Kuiz • How area active and passive transport different? • Which molecule powers active transport? • How are endo- and exocytosis similar? Different? • Which cell part controls active transport? • Once inside a cell, what actually kills bacteria that have been swallowed by endocytosis? • During exocytosis, which organelle fuses with the cell membrane?

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