* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download What is the Concentration of my Solution
Survey
Document related concepts
Cytoplasmic streaming wikipedia , lookup
Cell membrane wikipedia , lookup
Tissue engineering wikipedia , lookup
Endomembrane system wikipedia , lookup
Extracellular matrix wikipedia , lookup
Cell encapsulation wikipedia , lookup
Programmed cell death wikipedia , lookup
Cellular differentiation wikipedia , lookup
Cell growth wikipedia , lookup
Cell culture wikipedia , lookup
Cytokinesis wikipedia , lookup
Transcript
Where (the cell) have you been? Important Information • All of your cells were massed at ______________________ yesterday. Write this for your cells in the row “Mass it started with…” • All of your cells contain 75% water and 25% concentration of dissolved starch • The starch cannot go through the membrane, only water molecules • Hint: one of your cells was in an isotonic solution. 1. Next, you want to mass each cell so you can find out how it changed overnight. • It’s easier to mass the balloons in the bowl….so mass the bowl by itself first, then subtract the weight of the bowl from the bowl/balloon mass 2. Compare the mass of what the cell used to be and what it is now. Document how much it changed (for instance, -5 grams means it shrunk by 5 grams, lost mass) 3. Decide what type of solution the cell must have been in based on how it changed. Document this in the last row of your data table. (Hypotonic, Isotonic, Hypertonic?) 4. Now, look at the concentrations of the different colored solutions. • • • ● Based on how your cell changed in mass….and HOW MUCH it changed in mass, decide which cell was in which one of the solutions. (Each cell was in a different solution) Match your solution color with the letter on the cell. Raise your hand when your group is finished and I will check to see if you are correct. Each person answers their OWN conclusion questions (if you don’t understand, ask me) Cells A B C Mass It started with Mass After (subtract bowl) Difference +/- and amt. Type of Solution cell was in? Hypo, Iso, Hyper? Solution GREEN YELLOW PURPLE BLUE RED Solution Concentration of Starch Which Cell was in this solution? D E Name: Osmosis Activity Conclusion 1. What happens with the direction of osmosis (water flow) if a cell is put in an isotonic solution? 2. How did you determine which cell was in the isotonic solution? 3. What happens with the direction of osmosis (water flow) if a cell is put in a hypotonic solution? 4. How did you determine which cells were in the hypotonic solutions? 5. What happens with the direction of osmosis (water flow) if a cell is put in a hypertonic solution? 6. How did you determine which cells were in the hypertonic solutions? 7. Why would it have been impossible to do this lab if I hadn’t given you the mass of the “cells” before they were put in the solution? 8. What is a major difference between a plant cell being put in a hypotonic solution and an animal cell being put in a hypotonic solution?