title: Changes in the neurosecretory granules of the eel pituitary pars nervosa associated with change of background colour.
mesh_terms: D000818:Animals; D003116:Color; D003594:Cytoplasmic Granules / Q000502:physiology* / Q000648:ultrastructure; D004524:Eels / Q000502:physiology*; D008854:Microscopy, Electron; D010904:Pituitary Gland, Posterior / Q000502:physiology* / Q000648:ultrastructure; D013997:Time Factors