Cell membranes protect and organize cells. All cells have an outer plasma membrane that regulates not only what enters the cell, but also how much of any given substance comes in. Unlike ...

This takes place when molecules diffuse across the cell membrane by travelling through specific transport proteins. It occurs down a concentration gradient - molecules move from an area of high to ...

This is important because most signaling molecules are either too big or too charged to cross a cell's plasma membrane (Figure 1). Not all receptors exist on the exterior of the cell. Some exist ...

The plasma interacts with water molecules to generate highly reactive molecules containing oxygen and nitrogen, which ...

In a study published today in the ExRNA journal, researchers from the Novosibirsk Institute of Chemical Biology and Fundamental Medicine have proved that pre-analytical variables, as blood plasma or ...