1 / 12

Cell Processes

Cell Processes. Movement through Membranes. Passive Transport . No energy necessary 3 types Diffusion Facilitated Diffusion Osmosis. Diffusion. Diffusion- Movement of molecules from HIGH concentrations to LOW concentrations Ex: Aerosol spray Water and food coloring.

edna
Download Presentation

Cell Processes

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. Cell Processes Movement through Membranes

  2. Passive Transport • No energy necessary • 3 types • Diffusion • Facilitated Diffusion • Osmosis

  3. Diffusion • Diffusion- Movement of molecules from HIGH concentrations to LOW concentrations • Ex: • Aerosol spray • Water and food coloring

  4. Facilitated Diffusion • Diffusion with the help of a membrane channel protein • Ex. • Everyone UP!

  5. Osmosis • Diffusion of water across a membrane • Only water moves across membranes, not other materials • If there are more salts/sugars, then there are fewer water molecules • 3 types of solutions: • Hypertonic • Hypotonic • Isotonic

  6. Hypertonic Solution • Water moves OUT of a cell… cell shrivels up • Hypertonic = water = salt

  7. Hypotonic Solution • Water moves INTO a cell… cell swells up • Hypotonic = water = salt

  8. Isotonic Solution • Water moves EQUALLY (iso) into and out of a cell • No net movement = water = salt

  9. Active Transport • Energy used to force molecules from LOW concentrations to HIGH concentrations • Protein Pumps • Endocytosis • Phagocytosis and Pinocytosis

  10. Protein Pumps • A membrane protein that uses ATP to pump molecules from low to high High ATP Low ADP P

  11. Endocytosis • Taking in large materials using vesicles • Phagocytosis- taking in food particles • Pinocytosis- taking in liquid particles Exocytosis • Expelling large materials using vesicles

  12. Endocytosis/Exocytosis

More Related