Cell Transport By Mr. Krall

What is cell transport? Cells need to bring in water and nutrients. Cells need to get rid of wastes. The ways that cells move materials in and out of themselves are called cell transport.

There are two types of cell transport Active transport – when cells use energy to move materials. I’m going to kill her… Come on girls! Let’s go ladies! Passive transport – when materials move into or out of a cell on their own. I wish we could make stuff move on it’s own. Let’s just keep staring at it. Maybe it will. I did not see that coming.

Active Transport In active transport, the cell opens up the cell membrane and lets materials in or out. Opening the cell membrane is like opening a door, you have to make it happen. It takes energy. When the pizza delivery comes to your door, you need to open the door to bring in the pizza. It won’t come in on it’s own. Delivery!

Active Transport Endocytosis – when the cell uses energy to force a substance in through the cell membrane. Exocytosis – when the cell uses energy to force a substance out through the cell membrane.

Passive Transport In passive transport, small particles spread out from where they are crowded. Nature makes this motion happen all on it’s own. The particles move from where they are crowded to where they are not. The smell of the pizza will come in through the screen door all on it’s own. That’s passive transport.

Passive Transport Diffusion – when any substance spreads out from where it is crowded. Equilibrium – when the particles are as evenly spread out as they can get from diffusion.

Passive Transport Osmosis – when water moves by diffusion