Episode 118: Cell Signalling
The Science of Everything Podcast
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The Purpose of Extracellular Signaling
The ultimate purpose of extracellular signaling is to elicit some sort of change in the target cell and its metabolism or function. This includes things like mechanical pressure, changes in voltage, change in temperature or light. So different receptors in the nervous system are responsive to all of these different physical agents such as lights,. We have temperature receptors in our skin and mechanosensors that detect pressure or vibrations of a particular frequency and so forth.
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