Stuck on a problem? Get great tutoring at an affordable price with Chegg. Click here to join and get your 1st 30 minutes Free!

Signal transduction

From Biology-Online Dictionary
Jump to: navigation, search

Signal transduction

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 division). Can also be applied to sensory signal transduction, for example of light at photoreceptors.