6) What are cholinergic receptors? Which part of the autonomic nervous system activates cholinergic receptors? Which neurotransmitter activates cholinergic receptors? 7) What sensory receptor cells are found in the aortic arch and the carotid artery? What do the baroreceptors sense and how? What do the chemoreceptors sense and how? 8) What are the two main types of cholinergic receptors? What neurotransmitter binds to cholinergic receptors? Where will you find N1 receptors? N2 receptors? M1 and M2 receptors? Which type of cholinergic receptor is found at the neuromuscular junction (NMJ) and at the sympathetic ganglia?.