Passive diffusion plays an essential role in oral absorption of drugs through the gastrointestinal tract, penetration across the blood-brain barrier to reach Central Nervous System disease targets, ...

We previously characterized human duodenal uptake of C in vitro as a combined active (K T 558 μ M) and passive system (Gastro 91:10, 1986). To ascertain the response to physiologic or pharmacologic ...

Cell membranes are thin measuring around 5 nanometers thick and to put that into perspective you could fit about 10,000 membranes across one human hair. However, does understanding a cell membrane's ...