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Cell Membrane: Function and Transport

Explore the function of the cell membrane, including its role in separating the cell from the environment, controlling material transport, and responding to chemical signals. Learn about diffusion and active transport processes. Practice questions included.

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Cell Membrane: Function and Transport

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  1. Aim: How does the cell membrane function? Do Now: Do you spend energy biking up a hill? Why or why not? Do you spend energy biking down a hill? Why or why not?

  2. THE CELL MEMBRANE Is a thin structure that surrounds the cell. It is made of mostly fats (lipids), with some proteins embedded throughout.

  3. THE CELL MEMBRANE Is a thin structure that surrounds the cell. It is made of mostly fats (lipids), with some proteins embedded throughout.

  4. THE CELL MEMBRANE • Some functions include: • Separating the contents of the cell from the outside environment. • Controlling the transport of materials into and out of the cell. • Recognizing and responding to chemical signals.

  5. THE CELL MEMBRANE Plant Cell Has a cell membrane and a cell wall. Animal Cell Has a cell membrane.

  6. THE CELL MEMBRANE Plant Cell The cell wall is made out of cellulose (a carbohydrate) and gives the cell strength and rigidity What do you think will happen to the cell if too much water gets through the cell wall and cell membrane? It will burst.

  7. THE CELL MEMBRANE Molecules enter and leave the cell through either diffusion or active transport.

  8. DIFFUSION The movement of molecules from areas of high concentration to areas of low concentration. LOW HIGH This requires no energy.

  9. ACTIVE TRANSPORT The movement of molecules from areas of low concentration to areas of high concentration. LOW HIGH This requiresenergy! requires ATP

  10. Diffusionwill move the molecules in which direction?

  11. Active transport would move the molecules in which direction? requires ATP

  12. ACTIVE TRANSPORT

  13. practice questions On a loose leaf sheet of paper answer the following questions (put the question #, the answer, and your explanation for why that is the correct answer. 22, 23,24, 25, 27, 28, 29, 30, 32, 33,34, 35

  14. exit ticket Fill in the blank: Diffusion moves molecules from ___________ concentration to _________ concentration Active transport moves molecules from ___________ concentration to __________ concentration

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