Enables growth hormone-releasing hormone receptor activity. Involved in several processes, including activation of adenylate cyclase activity; cAMP-mediated signaling; and positive regulation of circadian sleep/wake cycle, non-REM sleep. Located in cell surface and sarcolemma. Used to study isolated growth hormone deficiency. Biomarker of sleep disorder. Human ortholog(s) of this gene implicated in isolated growth hormone deficiency. Orthologous to human GHRHR (growth hormone releasing hormone receptor). [provided by Alliance of Genome Resources, Apr 2022]