1 / 20

Chapter 7-3

Chapter 7-3. The Cell Membrane; Active & Passive Transport. The Cell Membrane. Gatekeeper Regulates what comes in and out of the cell Main components: proteins and phospholipids. Cell Wall. Found only in plant cells and bacteria cells Main function is support. Solutions.

lysandra-jarvis
Download Presentation

Chapter 7-3

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Chapter 7-3 The Cell Membrane; Active & Passive Transport

  2. The Cell Membrane • Gatekeeper • Regulates what comes in and out of the cell • Main components: proteins and phospholipids

  3. Cell Wall • Found only in plant cells and bacteria cells • Main function is support

  4. Solutions • Mixtures of substances • Ex. Salt + water; sugar + water

  5. Diffusion • The movement of molecules from an area of high concentration to an area of low concentration • Molecules tend to “spread out” • Requires no energy

  6. Equilibrium When molecules are evenly spread throughout a space

  7. Osmosis • The diffusion of water across a membrane • The cell membrane is selectively permeable • Watch the animation

  8. Rule for Osmosis If the area outside the cell has more salt – then water will be sucked out of the cell

  9. U - Tubes

  10. Cells In Different Solutions "ISO" means the same

  11. Hypo = less Cell may burst, or organelles called “contractile vacuoles” remove excess water Hypo - Blow

  12. Hyper = more Cell will shrink or die, plants wilt Why is it dangerous to drink sea water? Why does pouring salt on a slug kill it?

  13. Passive Transport • Requires no energy • Diffusion & Osmosis • Facilitated Diffusion – carrier proteins “help” molecules across the membrane

  14. 1.  Why is the water moving toward the left side of the beaker?  2.  Which side of the beaker is hypertonic? 3.  What is the solute?  

  15. WORD LIST • Diffusion • Osmosis • Selectively permeable • Equilibrium • Solution • Facilitated Diffusion • Hypertonic • Hypotonic • Isotonic • Contractile Vacuole • Passive Transport Know all of these words for the test

  16. ACTIVE TRANSPORT • Requires the cell to use energy • Proteins or Pumps found in the membrane move materials across

  17. Endocytosis • Taking “in” large molecules by the cell • Phagocytosis = “phood”, taking in food particles • Pinocytosis = liquid substances

  18. EXOCYTOSIS Removing large particles (waste) from the cell Stuff “exits” the cell

  19. Add to Word List • Active Transport • Endocytosis • Phagocytosis • Pinocytosis • Exocytosis • Protein Pump

More Related