City University of New York
The World of Cells: Osmosis
This definition and explanation osmosis shows how water diffuses from regions where it is in high concentration to regions where it is in low concentration.
Alabama Learning Exchange
Alex: Rubber Egg Diffusion
This lab will illustrate diffusion and osmosis through a semi-permeable membrane. A chicken egg will be used as the model cell, because the yolk is actually a single large cell. The surrounding egg white, or albumin, contains water and...
CK-12 Foundation
Ck 12: Life Science: Passive Transport
[Free Registration/Login may be required to access all resource tools.] The cell membrane is semi-permeable. Sometimes molecules need the help of special transport proteins or an input of energy to help them move across it. When an input...
CK-12 Foundation
Ck 12: Life Science: Diffusion
[Free Registration/Login may be required to access all resource tools.] The process of molecules moving from an area where there are lots of molecules to an area where there are fewer molecules is known as diffusion. The diffusion of...
Georgia State University
Georgia State University: Hyper Physics: Membrane Transport
This technical site provides an in depth look at membrane transport by clearly explaining the processes of diffusion and osmosis. Links are provided to clarify terminology.
Bio Topics
Bio Topics: How Substances Get Into (And Out Of) Cells
Understand the processes that allow substances to enter and exit a cell with this interactive online worksheet. Site discusses both diffusion and osmosis.
City University of New York
Brooklyn College: Osmosis Interactive Activity
Great activity with clear background information. Try out the lab using osmosis to calculate molecular weight.
McGraw Hill
Glencoe Biology: Cellular Transport: Self Check Quiz
Answer five multiple-choice quiz questions about the different types of cellular transport.
Khan Academy
Khan Academy: Osmosis and Tonicity
Provides an overview of osmosis and tonicity and looks at how osmosis works, as well as the role it plays in the water balance of cells. Describes hypertonic, isotonic, and hypotonic solutions and their effect on cells.