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Osmosis is Serious Business!


Author(s)

Troy R. Nash
Department of Biology
Mercer University
nash_tr@mercer.edu

Abstract

This directed case study involves two “stories,” each one concerned with some aspect of osmosis in living cells. Part I is centered around the effects of a hypertonic environment on plant cells, while Part II focuses on the effects of a hypotonic environment on human cells. After reading the parts, students working in small groups evaluate the information and answer the corresponding questions. This case was designed for use in a non-majors biology course, but could be adapted for use in a majors’ introductory biology course or a high school biology class.


Objectives

  • Understand solute concentration and the process of osmosis.
  • Be able to determine the net direction of osmosis in a given situation.
  • Understand osmosis in plant cells and be able to apply the term plasmolysis.
  • Understand osmosis in animal cells and be able to apply the term lysis.

Keywords

Osmosis; diffusion; tonicity; hypertonic; hypotonic; lysis; plasmolysis; blood cells; fertilizer

Educational Level

High school, Undergraduate lower division

Format

PDF

Type Methods

Directed

Language

English

Subject Headings

Biology (General)  |   Cell Biology  |   Physiology  |   Botany / Plant Science  |  


Date Posted

12/15/08

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Comments


Christian Moore
cdmoore28@gmail.com


Barcelona
06/08/2018
A fantastic resource for applying newly acquired knowledge on osmosis. I use this every year with IB biology classes.

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