Diffusion and Osmosis

Dialysis tubing in a solution to demonstrate osmosis

All cells are bound by some type of permeable or semipermeable membrane that governs the ions, small molecules, and large molecules that enter and leave the cell. Diffusion is the general process of movement down a gradient that results in equal concentrations of solutes on both sides of the membrane. When water is the molecule entering or leaving the cell the process is osmosis. This guide breaks down the important information students need to know, provides links to products and free digital resources, and includes suggestions for hands-on-labs that reinforce student learning.

Teaching the Cell Cycle and Mitosis

Mitosis is a process ubiquitous to life, and a foundational topic necessary for the understanding of advanced topics like growth and development, reproduction, and many disease processes.  However, students are often completely unfamiliar with mitosis. A comprehensive lesson plan for covering the topic is critical for building a foundation for student success in your biology […]

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