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What we ALREADY know:
•Cell membrane is found around the outside of an animal cell and it is the second layer of a plant cell
•The job of a cell membrane is to let “things” in and out of the cell
What we will soon KNOW:
•The Cell Membrane welcomes needed materials in 3 different ways…
•The Cell Membrane disposes of unneeded materials inside the cell by sending them out in 3 different ways…
Selectively Permeable:
= some materials can pass through an object while others cannot
Permeable= “to pass though” in Latin
1. Usually permeable to oxygen, water and carbon dioxide
2. Unlikely permeable to large objects and salts
3 Methods of Moving in and out of the Cell:
1. DIFFUSION2. OSMOSIS
3. ACTIVE TRANSPORT
Passive transport
A. PASSIVE TRANSPORT:
= the movement of materials across the membrane WITHOUT Energy
Let’s learn about the methods of PASSIVE transport……..