G-protein coupled receptor for flp-2 neuropeptides (PubMed:15809090, PubMed:24533288). May act through the G(q) alpha type of G proteins (PubMed:15809090, PubMed:24533288). Involved in mediating arousal from the sleep-like state called lethargus, which occurs during molting between larval and adult stages, in part by regulating touch sensitivity, and working in concert with neuropeptide pdf-1 (PubMed:27585848). Expressed in a subset of neurons in the head, midbody, and tail, including AIY, ASI, BAG, URA, CAN, I6, PVQ, DVA, RIM, and VC, and in the anal sphincter and intestinal muscles (PubMed:27585848). Expression from the ASI neurons is involved in promoting arousal (PubMed:27585848). Decreased locomotion velocity (PubMed:27585848). Restores normal quiescence during molting between larval and adult stages, in neuropeptide receptor npr-1 mutant background (PubMed:27585848). Belongs to the G-protein coupled receptor 1 family.