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Chapter 5
Chapter 5

... Signals are carried across the synaptic cleft between the presynaptic and postsynaptic cells by the diffusion of neurotransmitter molecules. Fast direct chemical synapses: the transmitter receptor proteins include the both the binding site for the transmitter and an ion channel. Neurotransmitters ar ...
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... the plasma membrane and then processed for release to the cell wall and/or as extracellular secretions. The expression of AGP genes is then considered along with the localization patterns of various AGPs; these data highlight the involvement of AGPs in plant development. Whereas AGPs are likely to h ...
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< 1 ... 315 316 317 318 319 320 321 322 323 ... 680 >

Cell membrane



The cell membrane (also known as the plasma membrane or cytoplasmic membrane) is a biological membrane that separates the interior of all cells from the outside environment. The cell membrane is selectively permeable to ions and organic molecules and controls the movement of substances in and out of cells. The basic function of the cell membrane is to protect the cell from its surroundings. It consists of the phospholipid bilayer with embedded proteins. Cell membranes are involved in a variety of cellular processes such as cell adhesion, ion conductivity and cell signalling and serve as the attachment surface for several extracellular structures, including the cell wall, glycocalyx, and intracellular cytoskeleton. Cell membranes can be artificially reassembled.
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