Active Transport Chapter 7.3.

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Presentation transcript:

Active Transport Chapter 7.3

Active Transport Three types of active transport Cell membrane pumps Endocytosis Exocytosis

Cell Membrane pumps Movement of molecules against the concentration gradient Small molecules and ions carried across membrane with membrane proteins that act like pumps Calcium potassium Sodium

Active Transport Pumps Cells concentrate substance in a particular location even when the forces of diffusion might work to move these substances in the opposite direction Converts ATP to ADP

Active Transport

Endocytosis Process of taking material into the cell Created by an in folding of the membrane Forms a vesicle Phagocytosis Pinocytosis

Types of Endocytosis Phagocytosis Pinocytosis Cell eating Cell drinking

Exocytosis Release of material into the extracellular space Vesicle fuses to membrane to release material