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 video of a so-called HeLa cell dividing demonstrates how sensitive the cell division process is. While all is going well at the beginning of ... A HeLa cell can range from 20 micrometers to 40 ...

Cell membranes protect and organize cells. All cells have an outer plasma membrane that regulates not ... which means that some molecules can diffuse across the lipid bilayer but others cannot.

For instance, neurotransmitters are a class of short-range signaling molecules that travel across ... membrane receptors interact with both extracellular signals and molecules within the cell ...

The oxygen diffuses across the partially permeable membrane of the alveoli cells and the capillary wall, into the red blood cells to be carried around the body. Osmosis close osmosisThe movement ...

Researchers at the Francis Crick Institute, King's College London and the University of Fribourg have developed polymer water ...

Lipid bilayers in mammalian membranes can have a more asymmetric composition than previously thought, new research shows.

Profilee Satyajit Mayor discusses his explorations of cell membranes, which are helping to update the classical fluid mosaic model of dynamic cellular boundaries. A series of rodent experiments showed ...

Cell membrane proteins hide secret gateways that ... This could allow us to go beyond current methods used in treating multiple conditions," he adds. This information, along with future findings ...