Transmembrane receptor???

[APPLEhead]

Hi guys, I need a little help to understand transmembrane receptor. To put simply, I don't know what it is. My friend told me that the transmembrane receptor is the G Protein-Receptor Complex, but when I asked my teacher, she said it wasn't? Can anyone give me an explanation? Also, what is the difference between a 'nervous system-neurotransmitter' and a 'neurotransmitter'?

Thanks

[pi]

A transmembrane receptor is any receptor that is located within the cell plasma membrane. G protein-coupled receptor are nearly all transmembrne receptors.

Can anyone give me an explanation? Also, what is the difference between a 'nervous system-neurotransmitter' and a 'neurotransmitter'?

Not entirely sure, but it could have something to do with the specific neurotransmitters that are involved solely within the nervous system, hence excluding the neurotransmitters used between neuomuscular junctions (for example). Although, I doubt this interpretation is correct tbh.