Active Transport

Activator Question:

What does it mean to be “Passive Transport”? Why

is Active Transport different?

I. Transport across the CM

1. Passive transport

• Diffusion

• Facilitated diffusion

• Osmosis

2. Active transport

• Ion Pumps

• Exocytosis

• Endocytosis

• Phagocytosis

• Pinocytosis

• Receptor-Mediated

No Energy Required

Require Energy

1. Mov’t of molecules AGAINST (up) a concentration gradient.

2. Requires ENERGY (ATP)

Like pushing a boulder up a hill.

3. Transport proteins are needed to move molecules across CM.

These proteins use up energy to work.

IV. Active Transport

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Replay

http://www.youtube.com/watch?v=owEgqrq51zY

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V. Movement in Vesicles

1.EXOCYTOSIS: mov’t of large molecules across the CM by a vesicle, OUT OF the cell.

V. Movement in Vesicles

2. ENDOCYTOSIS: mov’t of large substances across the CM by a vesicle, INTO the cell.

Exocytosis and Endocytosis

http://www.youtube.com/watch?v=DuDmvlbpjHQ

3. Three types of Endocytosis we will talk about 2

A. PHAGOCYTOSIS = ingestion or “eating” of molecules by the cell.

To help you remember:

PHAGO my EGO. This is how your immune cells destroy bacteria…they eat them!!!

Watch the phagocytosis animation

3. Three types of Endocytosis

B. PINOCYTOSIS = ingestion of liquid by a cell.

To help you remember:

PINO COLADA.

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http://www.brainpop.com/science/cellularlifeandgenetics/activetransport/

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