Cellular Transport.

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Presentation transcript:

Cellular Transport

Active and Passive Transport It is important for cells to control what enters and exits the cell. There are two main types of cell transport: Passive transport- does not require energy Active transport- requires energy in the form of ATP

Passive Transport When a cell uses no energy to move particles across a membrane passive transport occurs. Particles go DOWN their concentration gradient. Diffusion & osmosis are passive transport. Plasma membrane Concentration gradient

Active Transport Active transport :Movement of materials through a membrane. It goes against a concentration gradient and requires energy from the cell. Plasma membrane Concentration gradient

How can I remember this? Passive Transport because you don’t need to use any energy to go down the hill…just relax! Active Transport because you use energy to go up the hill by pedaling.

Types of Active Transport Endocytosis is a process by which a cell surrounds and takes in material from its environment. Exocytosis is the expulsion or secretion of materials from a cell.

Endocytosis