| vasoconstriction |
| G protein-coupled serotonin receptor activity |
| G protein-coupled serotonin receptor signaling pathway |
| neurotransmitter receptor activity |
| negative regulation of blood vessel diameter |
| serotonin receptor signaling pathway |
| smooth muscle contraction |
| cellular response to dopamine |
| response to dopamine |
| signal transduction involved in cellular response to ammonium ion |
| cellular response to catecholamine stimulus |
| cellular response to monoamine stimulus |
| response to catecholamine |
| response to monoamine |
| cellular response to ammonium ion |
| regulation of blood vessel diameter |
| regulation of tube diameter |
| regulation of tube size |
| circadian rhythm |
| vascular process in circulatory system |
| response to ammonium ion |
| G protein-coupled receptor signaling pathway, coupled to cyclic nucleotide second messenger |
| muscle contraction |
| rhythmic process |
| muscle system process |
| blood circulation |
| circulatory system process |
| cellular response to drug |
| anterograde trans-synaptic signaling |
| dendrite |
| chemical synaptic transmission |
| trans-synaptic signaling |
| synaptic signaling |
| regulation of anatomical structure size |
| cellular response to organic cyclic compound |
| cellular response to organonitrogen compound |
| cellular response to nitrogen compound |
| G protein-coupled receptor activity |
| response to organic cyclic compound |
| response to organonitrogen compound |
| response to drug |
| cellular response to oxygen-containing compound |
| response to nitrogen compound |
| cell-cell signaling |
| cellular response to endogenous stimulus |
| G protein-coupled receptor signaling pathway |
| integral component of plasma membrane |
| response to endogenous stimulus |
| response to oxygen-containing compound |
| system process |