Image of Particles Dispersing in Diffusion

Diffusion, Osmosis & Active Transport 
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Virtual Cell Biology Classroom of Science Prof Online


Diffusion, Osmosis & Active Transport Lecture 

These are the Diffusion, Osmosis & Active Transport Lecture materials used to supplement an actual college cell biology course.

Instructor's Corner
These lecture learning objectives are  a study guide based on the VCBC Diffusion, Osmosis & Active Transport Lecture PowerPoint:
  • Diffusion, osmosis, and active transport; Understand how these processes relate to molecules moving across the plasma membrane.
  • What is the plasma membrane, its role and what it is made of?
  • What is tonicity (isotonic, hypertonic, hypotonic), and how does it relate to osmosis.
  • Be able to solve tonicity problems (What would happen to a cell sitting in various concentrations of solution. Be able to tell me which way water would move, into or out of the cell.)​
  • What is active transport? How does it differ from diffusion and active transport?

Versions of Aerobic Respiration PPT:

Printing: The best way for students to print out the PowerPoint Show is to download the PDF version. Select Print, and, when the Print screen comes up, go to the Print Handling options. Under Page Scaling, select "Multiple pages per sheet", Under Pages per sheet, select "2". That uses up less paper, placing two slides on each page.

The Diffusion, Osmosis & Active Transport Lecture materials include:
  • list of learning objectives
  • PowerPoint lecture
  • homework assignment
  • "class note" articles  
  • review & practice test questions

3D rendering of diffusion of purple dye in water.
Random collisions of particles in a gas.
Virtual Cell Biology

You have free access to a large collection of materials used in a college-level introductory Cell Biology Course. The Virtual Cell Biology Classroom provides a wide range of free educational resources including Power Point Lectures, Study Guides, Review Questions and Practice Test Questions.
Endomembrane System of a Eukaryotic Cell, Mariana Ruiz
Page last updated: 10/2015
The SPO website is best viewed in Microsoft Explorer, Google Chrome or Apple Safari.

  • Osmosis animation from St. Olaf College.

Word document of a single essay question given to students at the end of the lecture. This tool helps the students review the main messages of the lecture while allowing the instructor to assess the class' understanding of the material. 

Here is what you need to read, in addition to the PowerPoint, to master this topic. Check Moodle and your Homework & Reading Assignment Schedule for additional readings.

These multiple-choice / matching practice test questions and essay review question are designed to help you better understand this material. 

Instructors Corner
 of Science Prof Online

You have access to a large collection of free science teaching materials used in high school and college-level introductory science courses. The SPO Instructors Corner has resources for teaching general science, anatomy & physiology, chemistry, cell biology genetics, immunology and microbiology.
Instructors Corner of Science Prof Online