EOG8284GD	GO:0004888	1/5	transmembrane signaling receptor activity	molecular_function	"Combining with an extracellular or intracellular signal and transmitting the signal from one side of the membrane to the other to initiate a change in cell activity." [GOC:go_curators, Wikipedia:Transmembrane_receptor]
EOG8284GD	GO:0007166	1/5	cell surface receptor signaling pathway	biological_process	"A series of molecular signals initiated by activation of a receptor on the surface of a cell. The pathway begins with binding of an extracellular ligand to a cell surface receptor, or for receptors that signal in the absence of a ligand, by ligand-withdrawal or the activity of a constitutively active receptor. The pathway ends with regulation of a downstream cellular process, e.g. transcription." [GOC:bf, GOC:mah, GOC:pr, GOC:signaling]
EOG8284GD	GO:0016020	1/5	membrane	cellular_component	"A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it." [GOC:dos, GOC:mah, ISBN:0815316194]