Serotonin binds to metabotropic receptors, specifically G protein coupled receptors called 5-HTs. If… Show more Serotonin binds to metabotropic receptors, specifically G protein coupled receptors called 5-HTs. If serotonin is released into a synapse and serotonin binds to 5-HTs to elicit EPSPs, what immediate effect would you observe in the postsynaptic cell? A – Increase in ATP synthase activity B – Increase in PKA activity C – Increase in dynein activity D – Increase in DNA methylation E – Increase in sodium-potassium pump activity • Show less