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Transport Processes in a Cell - Coggle Diagram
Transport Processes in a Cell
Cell membrane structure
The cell membrane is selectively permeable
Some materials are allowed to cross the cell membrane while others are not
Some materials are only allowed to cross by specific channels
Carbohydrates, proteins and lipids are important molecules that make up the structure of the cell membrane
the cell membrane is not rigid, instead it is flexible
Types of transport in the cell
Passive Transport: No energy is needed to move materials
Diffusion
The movement of molecules from an area of high concentration to an area of low concentration
Osmosis
The movement of water across the cell
Facilitated diffusion
The channels in the cell membrane facilitate the movement of some molecules
Active Transport: Energy is needed to move materials
Endocytosis
The cell uses energy to change the shape of an molecule and engulf it
Exocytosis
The reverse process in which the cell allows the molecule to leave the membrane