I already mentioned how amazing our cell membranes are. Life as we know it depends on the barriers membranes present and the conditions maintained within them.
The next time you flex a muscle or have a thought pause and reflect on the symphony of interactions happening at countless cell membranes.
To understand the complexity and to see the ways cells can manage the movement of molecules, ions, and other particles I gave the students. Play dough, pasta, candy, and lentils. They made a two-dimensional model of a cell membranes to see how materials move across the membrane. Here are a few pictures of their work.
