Active transport.

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Presentation transcript:

Active transport

Active Transport Defined: Molecules move from a LOW to a HIGH concentration ATP energy needed to fight diffusion ATP = Adenosine Triphosphate ATP activates pumps (see animation)

Contractile vacuole of a Paramecium As water enters this cell by diffusion, it is immediately pumped out to prevent bursting

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

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

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

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?