title: Substance P-like immunoreactive axon varicosities with synaptic junctions in the nucleus tractus solitarius of the rat.
abstract: Substance P-like immunoreactive axon varicosities form both Gray's type I and type II synaptic junctions to the dendrites and somata in the nucleus of the tractus solitarius of the rat. Peroxidase anti-peroxidase reaction products are observed mainly on the large dense-cored vesicles and in the axoplasm preferentially surrounding small clear vesicles. Labeled axon varicosities are filled with small clear vesicles of 50 nm in diameter.
mesh_terms: D000818:Animals; D001369:Axons / Q000648:ultrastructure*; D007124:Immunoenzyme Techniques; D008297:Male; D008526:Medulla Oblongata / Q000648:ultrastructure*; D008854:Microscopy, Electron; D051381:Rats; D013373:Substance P / Q000032:analysis*; D013569:Synapses / Q000648:ultrastructure*
chemical_list: D013373:Substance P