Diffusion Across a Semipermeable Membrane

Explore the role of pore size in the diffusion of a substance across a membrane.

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Explore the role of pore size in the diffusion of a substance across a membrane. Diffusion is the process of a substance spreading out from its origin. Molecules diffuse through random molecular motion. Diffusion is always happening, even when a system appears to have reached equilibrium, because molecules are always moving. Cells are selectively permeable, meaning that their membranes allow some substances to cross easily while others are unable to cross without assistance. Cell membranes are selectively permeable, in part because its pores are small, allowing the cell to prevent larger molecules from moving across the membrane.

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WARNING: Your data will not be saved. Please view the requirements below before launching this activity.

Copyright
© Copyright The Concord Consortium

Record Link
<a href="">The Concord Consortium. Diffusion Across a Semipermeable Membrane. Concord: The Concord Consortium, 2013, July 30.</a>

AIP
Diffusion Across a Semipermeable Membrane (The Concord Consortium, Concord, 2013, July 30), WWW Document, (https://concord.org/).

AJP
Diffusion Across a Semipermeable Membrane (The Concord Consortium, Concord, 2013, July 30), WWW Document, (https://concord.org/).

APA
Diffusion Across a Semipermeable Membrane. (2013, July 30). Retrieved 2017, June 24, from The Concord Consortium: https://concord.org/

Disclaimer: The Concord Consortium offers citation styles as a guide only. We cannot offer interpretations about citations as this is an automated procedure.

Requirements

This activity runs entirely in a Web browser. Preferred browsers are: Google Chrome (versions 30 and above), Safari (versions 7 and above), Firefox (version 30 and above), Internet Explorer (version 10 or higher), and Microsoft's Edge.

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الخاصية الأسموزية

Why does the app seem to be built to save user data, but not actually allow you to save the data? Is there a way to save student data? Or export it? Or maybe the questions in a PDF handout that we can have them work through while going through the activity? I am really struggling with how cool this sim is yet how impractical it is if I cannot get students' assessment data out of the app. Please help!

Hi John. These standalone interactives aren't built to save data themselves, but they can be used within activities that save student data. As an example, see this Diffusion activity which includes similar interactives. If you register as a teacher on the ITSI portal, you can assign that activity to your students and their data will be saved and will be viewable in reports.

You could also, as you suggest, create your own handout of questions to record their work when they use the model, or embed the model in another LMS that allows you to record student responses.

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Next-Generation Molecular WorkbenchThis resource is a part of the Concord Consortium's Next-Generation Molecular Workbench project.

Grade Level
Middle School, High School, Higher Education
Subject
Biology, Chemistry, Physics
Rating
5
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