Cellular Energy Cellular processes require a constant supply of energy

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Presentation transcript:

Cellular Energy Cellular processes require a constant supply of energy Adenosine triphosphate (ATP) is the most common energy supply ATP has 3 main parts: Nitrogen containing base A sugar (ribose) 3 Phosphate groups ATP’s energy is held within the bonds; cells break the bonds to release the energy ATP is created when cells break down glucose

Active Transport Types of Active Transport: Cell Membrane Pumps Movement of molecules using cellular energy (ATP) Movement goes from [Low]  [High] Against the concentration gradient Types of Active Transport: Cell Membrane Pumps Uses carrier proteins Sodium-Potassium Pump: 1. Na+ attaches to carrier protein; ATP binds to CP 2. CP shape changes 3. Na+ released; K+ attaches from other side 4. CP changes shape, releasing K+ on opposite side

Active Transport Endocytosis: Cell ingests outside fluid and large particles Starch, protein, other cells Pockets of the cell membrane form around the particles to make vesicles 2 Types: Pinocytosis – ingest fluid or small particles Phagocytosis – ingest large particles or cells

Active Transport Endocytosis: - Phagocytosis of white blood cell and bacterium:

Active Transport Exocytosis: Cells remove or expel large particles or wastes Cells often make materials needing to be exported to other cells Ex: Neurotransmitters

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