Since late 1980s, a few Chinese artists have branched out traditional Chinese calligraphy to a new territory by mingling Chinese characters with English letters; notable new forms of calligraphy are Xu Bing's square calligraphy and DanNie's coolligraphy or cooligraphy.
Confidence votes 62. In one method, transport proteins in the cell membrane pick up molecules outside the cell and carry them in, using energy. Transport proteins also carry molecules out of cells in a similar way. In one method, transport proteins in the cell membrane pick up molecules outside the cell and carry them in, using energy.
Facilitated diffusion is the flow of molecules down a concentration gradient, across a membrane, but requires the help of a protein. There are two categories of proteins that assist facilitated diffusion: carrier proteins and channel proteins. Carrier proteins are like taxi cabs in a cell membrane.