This lesson introduces diffusion as a key process for the movement of substances in and out of cells. Students learn that diffusion is the net movement of particles from an area of higher ...

This PowerPoint is a whole lessons included with student activities and animated answers. Definition of diffusion from high concentration to lower concentration. What diffuses in and out of cells. How ...

Sticky spots on cell membranes hold onto the master regulator of cell polarity, helping to ensure that the regulatory protein accumulates in high enough concentrations to trigger cell polarity. Over ...

One of the most stubborn limitations in metabolomics is not measuring molecules but making sense of what the measurements mean. Modern instruments can quantify hundreds of metabolites in a single ...

This video explains how particles spread through diffusion from areas of high concentration to low concentration. Different factors affect the rate of diffusion – temperature, concentration gradient ...