title: Diurnal changes in sympathetic nerve endings in the mouse pineal: semiquantitative electron microscopic observations.
mesh_terms: D000818:Animals; D003594:Cytoplasmic Granules; D003624:Darkness; D008027:Light; D008297:Male; D051379:Mice; D008854:Microscopy, Electron; D009411:Nerve Endings / Q000502:physiology*; D010507:Periodicity; D010870:Pineal Gland / Q000502:physiology*; D013564:Sympathetic Nervous System / Q000502:physiology*