Signal transduction occurs when an extracellular signaling molecule activates a specific receptor located on the cell surface or inside the cell. In turn, this receptor triggers a biochemical chain of events inside the cell, creating a response. Depending on the cell, the response alters the cell`s metabolism, shape, gene expression, or ability t....
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http://en.wikipedia.org/wiki/Signal_transduction
Molecular pathways through which a cell senses changes in its external or internal environment and changes its pattern of gene expression or enzyme activity in response. After [
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http://sis.nlm.nih.gov/enviro/iupacglossary/glossarys.html
(from the article `lipid`) ...of nerves and chemical `messengers.` The overall process of receiving these messages and converting the information they contain into metabolic ...
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http://www.britannica.com/eb/a-z/s/93
The process by which a cell responds to substances in its environment. The binding of a substance to a molecule on the surface of a cell causes signals to be passed from one molecule to another inside the cell. These signals can affect many functions of the cell, including cell division and cell death. Cells that have permanent changes in signal tr...
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http://www.cancer.gov/dictionary?expand=S
The biochemical events that conduct the signal of a hormone or growth factor from the cell exterior, through the cell membrane, and into the cytoplasm. This involves a number of molecules, including receptors, pro- teins, and messengers.
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http://www.encyclo.co.uk/local/20095
The cascade of processes by which an extracellular signal (typically a hormone or neurotransmitter) interacts with a receptor at the cell surface, causing a change in the level of a second messenger for example calcium or cyclic AMP) and ultimately effects a change in the cells functioning (for example: triggering glucose uptake or initiating cell ...
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http://www.encyclo.co.uk/local/20973
The cascade of processes by which an extracellular signal (typically a hormone or neurotransmitter) interacts with a receptor at the cell surface, causing a change in the level of a second messenger (for example calcium or cyclic AMP) and ultimately effects a change in the cell's functioning (for example, triggering glucose uptake, or initiating cell division). Can also be applied to sensory signal transduction, eg. of light at photoreceptors.
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http://www.encyclo.co.uk/visitor-contributions.php
Signal transduction: A basic process in molecular cell biology involving the conversion of a signal from outside the cell to a functional change within the cell. A signal (such as a hormone or neurotransmitter) interacts with a receptor on the cell surface; this interaction causes a change in a second messenger (such calcium); and, eventually, a ch...
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http://www.medterms.com/script/main/art.asp?articlekey=11936
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