EOG886BWX GO:0005576 3/14 extracellular region cellular_component "The space external to the outermost structure of a cell. For cells without external protective or external encapsulating structures this refers to space outside of the plasma membrane. This term covers the host cell environment outside an intracellular parasite." [GOC:go_curators] EOG886BWX GO:0007586 1/14 digestion biological_process "The whole of the physical, chemical, and biochemical processes carried out by multicellular organisms to break down ingested nutrients into components that may be easily absorbed and directed into metabolism." [GOC:isa_complete, ISBN:0198506732] EOG886BWX GO:0007218 1/14 neuropeptide signaling pathway biological_process "The series of molecular signals generated as a consequence of a peptide neurotransmitter binding to a cell surface receptor." [GOC:mah, ISBN:0815316194]