Cell membranes protect and organize cells. All cells have an outer plasma ... also pass through membranes, but they do so more slowly. On the other hand, cell membranes restrict diffusion of ...

A key step that determines the intensity and duration of monoamine signalling at synapses is the reuptake of the released transmitter into nerve terminals through high-affinity plasma membrane ...

In both single-celled organisms like prokaryotic bacteria and eukaryotic algae, oxygen and carbon dioxide molecules move by diffusion through cell membranes. Larger multi-cellular organisms such ...