G-protein coupled receptor that does not act through opening of potassium channels is
Muscarinic M2 receptor
Dopamine D2 receptor
Serotonin 5 HT 1 receptor
Angiotensin 1 receptor
* DGPCR which act through opening of K+ channels lead to hyper polarisation, thus leading to inhibition.So, receptor which causes stimulation will not act through opening of K+ channels. o Muscarinic M2 receptor, Dopamine D2 receptor and serotonin 5HT1 receptor act through opening of K+ channels.o Whereas Angiotensin 1 receptor act by increasing Ca+2.