biology video Archive

Video: The Properties of Water

Our introductory chemistry series has taken you from the basics of atomic structure through the nature of the polar covalent bond. In the final video in this series we explore the importance of hydrogen bonds …

Video: Polar Covalent Bonds

Before starting a class in biology or genetics, it is often useful to review some of the basic principles of chemistry, specifically the general characteristics of atoms and chemical bonds. In our earlier videos we …
Video: How do Membrane Channel Proteins Work?

Video: How do Membrane Channel Proteins Work?

The generation of action potentials across a membrane is often a confusing topic, with sodium and potassium ions moving in different directions at different times. Understanding this process is even more difficult if you don’t …
Video: Osmosis and Tonicity

Video: Osmosis and Tonicity

One of the most challenging topics in the first few weeks of an introductory biology course is the concept of osmosis and tonicity. We have designed a new video, “Osmosis and Tonicity” to help students …