1. Movement Through the Membrane Mr. Luis A. Velázquez Biology

4. Cell Membrane The cell membrane is also known as: – Phospholipids bi-layer – Plasma membrane – Fluid mosaic membrane

5. Diffusion Diffusion Motion of particle for high concentration To low concentration. This causes many substances to move across a cell membrane and not require ATP energy.

7. Osmosis is a type of diffusion. The movement of water across a semi permeable membrane. What is Osmosis?

9. Passive Transport When material move from areas of high concentration to low concentration they don’t requires energy. – Examples Diffusion Facilitate Diffusion Carrier Protein Osmosis Particles Water

10. Active Transport When material move from areas of low concentration to high concentration they requires energy. – Examples Endocytosis Exocytosis

11. Endocytosis

12. Exocytosis

13. Types of Endocytosis Phagocytosis Pinocytosis

14. Phagocytosis

15. Pinocytosis

16. What can diffuse through? Small & nonpolar molecules can diffuse through the cell membrane CO 2 O 2

17. Plasma Membrane Hydrophobic- Nonpolar Lipids Hydrophilic - Polar Phosphate Water is what type of molecule? Polar or nonpolar?

18. http://www.northland.cc.mn.us/biology/BIOLOGY1111/animations/passive1.swf Interactive Review online