Receptors
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8 Terms
what is a receptor?
a structure that binds neurotransmitter
what is an ionotropic receptor?
a receptor that is also a channel
why are inotropic receptors fast?
binding directly opens the channel in one step
what is a metabotropic receptor?
a receptor that is not itself a channel but affects channels through multi-step signalling
what are G protein-coupled receptors?
a type of metabotropic receptor
why are metabotropic receptors slower?
they involve more steps and more molecules between receptor binding and channel effects
which receptor type is more common in the nervous system?
metabotropic receptors
why is it wrong to assume fast receptors must be more common?
slow, longer-lasting signalling is often very useful in the nervous system