Introduction to Cell & Molecular Biology (BIOL121) - Dr. S.G. Saupe (ssaupe@csbsju.edu); Biology Department, College of St. Benedict/St. John's University, Collegeville, MN 56321 |
"Spuds" McSaupe Studies Membranes
Setting: The famous scientist, Spuds McSaupe, Ph.D., will visit our class today to discuss osmosis, diffusion and cell membranes. He will show us an experiment involving potato tubers. Spuds will obtain beakers containing water and a beaker of concentrated salt solution. He will cut cores from a potato, measure the length of each, and then incubate them in either water or a salt solution, respectively. This "experiment" is diagrammed as follows:
Make some predictions:
Results:
Water | Salt | ||
Core Length (mm) | Initial (mm) | ||
Final (mm) | |||
Change (mm) | |||
% Change ((F - I)/I *100) |
|||
Turdigity (-, +, ++) | Initial | ||
Final |
Last updated: July 14, 2009 � Copyright by SG Saupe