| 单词 | cell membrane |
| 释义 | cell membrane (once / 129883 pages) n A cell membrane is like a cell's gatekeeper. It's the outer layer that surrounds a cell, letting substances in — or keeping them out. A membrane is a barrier that offers protection, like a rubber membrane that keeps rain from seeping under your roof. A cell membrane surrounds and protects the contents of a cell. It controls which substances can enter and exit the cell. The membrane also gives a cell its shape and enables the cell to attach to other cells, forming tissues. WORD FAMILYcell membrane: cell membranes USAGE EXAMPLESInside, a gaggle of mostly white students were finishing up a short biology quiz on cell membranes. New York Times(Dec 12, 2016) When water is excluded, as it is in the hydrophobic interior of a cell membrane, the dye lights up. Science Magazine(Aug 23, 2016) As a result, our cell membranes look different, O’Keefe says. Time(Jul 18, 2016) n a thin membrane (a double layer of lipids) enclosing the cytoplasm of a cell; proteins in the membrane control passage of ions (like sodium or potassium or calcium) in and out of the cell all cells have a cell membrane Syn|Hyper cytomembrane, plasma membrane semipermeable membrane a membrane (as a cell membrane) that allows some molecules to pass through but not others |
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