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The Cell in its Environment

The Cell in its Environment. The Cell Membrane stars in:. The Gatekeeper. 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.

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The Cell in its Environment

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  1. The Cell in its Environment The Cell Membrane stars in: The Gatekeeper

  2. 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

  3. 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…

  4. 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

  5. 3 Methods of Moving in and out of the Cell: 1. DIFFUSION 2. OSMOSIS Passive transport 3. ACTIVE TRANSPORT

  6. A. PASSIVE TRANSPORT: = the movement of materials across the membrane WITHOUT Energy Let’s learn about the methods of PASSIVE transport……..

  7. What will happen?!?

  8. 1. Diffusion: Process where molecules in high conc. will move to areas of low conc.

  9. QUIZ!!!

  10. 2. Osmosis: Diff. of H2O Neato fact: osmosis is what makes fresh and salt water fish so different…

  11. B. ACTIVE TRANSPORT!!! = the movement of materials through a membrane USING energy

  12. 1. Gross… it did what?!?! Endocytosis!!! = 1) the cell membrane surrounds or engulfs a particle and then 2) it will pinch off to form a vacuole around it in the cell (this still uses E)

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