1 / 14

Diffusion and Osmosis

Diffusion and Osmosis. TSWBAT identify the process of osmosis and diffusion via the gummi bear lab -analyze diffusion through a sand baggie and apply the concepts of hypotonic, hypertonic, and isotonic to the activity. On a blank sheet of paper Write the equation for cellular respiration.

Download Presentation

Diffusion and Osmosis

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. Diffusion and Osmosis

  2. TSWBAT identify the process of osmosis and diffusion via the gummi bear lab-analyze diffusion through a sand baggie and apply the concepts of hypotonic, hypertonic, and isotonic to the activity • On a blank sheet of paper • Write the equation for cellular respiration. • Where does cellular respiration occur in the cell? • List the organelles that help to make proteins • What is the difference between the rough and the smooth endoplasmic reticulum?

  3. 1 4 2 3 Diffusion • Solvent – what dissolve something • Solute – what is being dissolved • Solute molecules moving from an area of high concentration to an area of low concentration • Random motion drives diffusion • Movement is based on kinetic energy (speed), charge, and mass of molecules • Equilibrium is reached when there is an even distribution of solute molecules • http://highered.mcgraw-hill.com/sites/0072495855/student_view0/chapter2/animation__how_diffusion_works.html (water)

  4. Osmosis • Diffusion of water through a semi-permeable membrane • Semi-permeable: permeable to solvents (WATER), but not to large molecules • High [water] to low [water] • Dissolved molecules (i.e. glucose, starch) are called solutes • REMEMBER: Water = solvent Glucose, Starch = solutes http://highered.mcgrawhill.com/sites/0072495855/student_view0/chapter2/animation__how_osmosis_works.html

  5. Effect of Water on Cells • Hypertonic Environment • High [solute], low [water] • The cell will shrink • Plasmolysis – cell death Hypotonic Environment • High [water], low [solute] • Plants – turgor pressure – plant like this!! • Animals – cytolysis – cell bursting • Isotonic Environment • [water] = [solute] Hypertonic Hypotonic Isotonic Part 3 pg. 85

  6. Cellulose in cell wall Osmosis in Living Cells

  7. Isotonic Predictions? Hypertonic Hypotonic Osmosis in Red Blood Cells • 0.9% saline • 10% NaCl • Distilled water Plasmolysis

  8. Hypertonic Predictions? Hypotonic Osmosis in Plant Cells Plasmolysis • . • 10% NaCl • Distilled water

  9. Animations Dialysis Bag Experiment • http://ccollege.hccs.cc.tx.us/instru/Biology/AllStudyPages/Diffusion_Osmosis/Baggif.swf Elodea Cell • http://ccollege.hccs.cc.tx.us/instru/Biology/AllStudyPages/Diffusion_Osmosis/Elodeagif.swf Osmosis • http://ull.chemistry.uakron.edu/genobc/animations/osmosis.mov

  10. Transportation of Molecules • Passive Transport • Movement of molecules across a semi-permeable membrane • no energy required • Active Transport • Movement of molecules across a semi-permeable membrane against a concentration gradient with a protein • ENERGY – ATP • Facilitated Diffusion • Movement of molecules across a semi-permeable membrane with a protein • no energy required

  11. Effect of Water on RBC

More Related