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| It is a membrane in cells that only allows certain things in. |
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| refers to the physical property of a molecule that is repelled from a mass of water. |
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| carbohydrate-attached lipids. Their role is to provide energy and also serve as markers for cellular recognition. |
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| are proteins embedded in the cell membrane that regulate the flow of water. They are "the plumbing system for cells." |
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| it is the movement of water across a semi-permeable membrane from an area of high water potential (low solute concentration) to an area of low water potential (high solute concentration). |
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| also known as coupled transport, refers to the simultaneous or sequential passive transfer of molecules or ions across biological membranes in a fixed ratio. Permitting one ion or molecule to move from the side where it is more concentrated to that where it is less concentrated increases entropy and can serve as a source of energy for metabolism (e.g. in ATP synthase) |
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is a form of endocytosis in which small particles are brought into the cell suspended within small vesicles which subsequently fuse with lysosomes to hydrolyze, or to break down, the particles. This process requires energy in the form of adenosine triphosphate
"Cell Drinking" |
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| is a cellular process where cells eject waste products or chemical transmitters (such as hormones) from the interior of the cell. |
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| 'Water loving'. The capacity of a molecular entity or of a substituent to interact with polar solvents, in particular with water, or with other polar groups. |
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A molecule that consists of a carbohydrate plus a protein.
play essential roles in the body. For instance, in the immune system almost all of the key molecules involved in the immune response are these |
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| a protein involved in the movement of ions, small molecules, or macromolecules, such as another protein across a biological membrane. |
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| Net movement of molecules across a semipermeable membrane. |
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| the spontaneous passage of molecules or ions across a biological membrane passing through specific transmembrane transport proteins. |
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| the voltage difference between the interior and exterior of the cell. |
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| is the cellular process of phagocytes and protists of engulfing solid particles by the cell membrane to form an internal phagosome. |
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| receptor-mediated endocytosis |
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| is a process by which cells internalize molecules by the inward budding of plasma membrane vesicles containing proteins with receptor sites specific to the molecules being internalized. |
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