Transporting substances Flashcards
What is diffusion?
Substances move from a area of high concentration to an area of low concentration
In what substances do diffusion happen in?
Liquids and Gases
Is Energy required in diffusion?
No
Is a membrane required?
No
What is osmosis?
Diffusion of water molecules from an area of high concentration to a area of low concentration
In what substances do osmosis happen in?
Water molecules only
Is energy required for osmosis?
No
Is a membrane required for osmosis
Occurs over a membrane using transport proteins
What is active transport?
The movement of dissolved molecules into or out of a cell from a region of low concentration to high concentration
Is energy required for active transport?
Energy is required`
Is a membrane required for active transport?
Occurs over a partially permeable membrane