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wood prints molecule wood prints cell wood prints neurone wood prints neurotransmitter wood prints tissue wood prints signalling wood prints communicating wood prints biochemistry wood prints biology wood prints cytology wood prints biochemical wood prints biological wood prints cellular wood prints cytological wood prints effector wood prints

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Cell signalling. Computer artwork of neurotransmitter molecules travelling between a neurone (nerve cell, green) and an effector cell (orange). The junction between the two cells is called a synapse. Signalling molecules, such as neurotransmitters, allow cells to respond to changes in their environment and to coordinate this response. They can trigger a number of reactions, including changes in metabolism and gene expression. Cell communication over short distances, as shown here, is known as paracrine signalling.

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