1 / 14

The movement of materials in and out of a cell

The movement of materials in and out of a cell. Two types of transport. Selectively Permeable Membrane- [like a strainer] - contains different size openings called pores - only materials smaller than openings pass through. Diffusion- Movement of molecules from an area where

lindabell
Download Presentation

The movement of materials in and out of a cell

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. The movement of materials in and out of a cell

  2. Two types of transport

  3. Selectively Permeable Membrane- [like a strainer] - contains different size openings called pores - only materials smallerthan openings pass through

  4. Diffusion- Movement of molecules from an area where there are many to an area where there are few Examples:food coloring in water, spraying air freshener Simple Rule: HIGH TO LOW IS THE FLOW CONTINUES UNTIL ……. Equilibrium/Homeostasis- molecules are equally distributed in an area

  5. Osmosis- movement of WATER molecules from an area where there are many to an area where there are few

  6. Which way will molecules move?What process is it? 10% Water Time 100% Water Osmosis High sugar Time Low Sugar Diffusion

  7. Osmosis can effect plant and animal cells differently • Can you think of which cell organelle that a plant has which an animal cell does not, that may have something to do with this? • The Cell Wall!!

  8. Plant Cells Fresh Water Salt Water Cell Membrane Plasmolysis-cell membrane shrinking away from cell wall, due to water exiting cell Why? Salt is a substance that will draw water in its direction. This is why you feel thirsty when you eat something salty. Simple Rule: Salt Sucks

  9. Plant Cells HYPER= more TONIC = solution HYPO = less TONIC = solution HYPOTONIC CELL HYPERTONIC CELL 100% H2O 90% H2O 10% NaCl 97% H2O 97% H2O Water moves out of cell, Cell membrane pulls away from cell wall Water rushes into cell, keeps cell rigid PLASMOLYSIS

  10. Animal Cells HYPOTONIC CELL HYPERTONIC CELL 95% H2O 100% H2O 90% H2O 100% H2O - Water rushes into cell - Cell swells and may burst due to lack of cell wall • - Water rushes out of cell • Cell shrinks due to lack of cell wall

  11. ISO = same TONIC = solution ISOTONIC CELL 97% H2O 97% H2O • Cell does not change, water equal inside and out • Equilibrium/Homeostasis

  12. Active Transport – requires energy Endocytosis- process used by cells to transport large materials [proteins] INTO cell Greek terms : ENDO = inside CYTOSIS = relates to cell

  13. Exocytosis- process used by cell to move wastes or other materials OUT of cell Greek terms : EXO = outside CYTOSIS = relates to cell

  14. What do you know? • What are the 2 general types of cell transport and what is the difference between them? • How does a selectively permeable membrane work? • What is diffusion? • What is osmosis and how is it different in plant and animal cells? • What is the difference between hypertonic, hypotonic, and isotonic cells? • What are the 2 types of active transport and how do they work?

More Related