Transport of molecules within a cell and out of the cell requires a complex endomembrane system. Endocytosis occurs when the cell membrane engulfs particles (dark blue) outside the cell ...

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 ...

(A) Electron micrograph of a human cell section showing three mitochondria. (B) Scheme of the protein complexes that form the ETS, showing the mitochondrial membranes in blue and red; NADH ...

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

MERS-CoV and Respiratory Syncytial virus to find all the keys and passwords that give viruses access to the interior of our cells and that allow transport across tissues.

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 ...

If that system was disrupted, parcels would end up lost or in the wrong place. Similarly, all human cells require large protein coat complexes, working at transport hubs called endosomes ...