Frog's olfactory mucosa has been observed with the electron microscope. Ultrastructure of olfactory neurons has been described and several organelles recognized.The rods of the olfactory receptors bear cilia with the characteristic 9 + 2 pattern of filaments. Supporting cell's do not bear cilia but show an irregular series of microvilli. The supporting cell's show in their cytoplasm a complex arrangement of organelles and their role is likely to be more complex than their name implies. Secretory phenomena, for instance, can be observed. Ultrastructural characteristics of these elements have been compared with the ultrastructure of epithelial cells in the respiratory area.
Referenze Bibliografiche
[1] ALLISON A. C., The morphology of the vertebrate olfactory system, «Biol. Rev.», 28, 195-244 (1953).
[2] BLOOM G., Studies on the olfactory epithelium of the frog and the toad with the aid of light and electron microscopy, «Z. Zell.», 41, 89-100 (1954).
[3] CLARK LE GROS W. E., Inquiries into the anatomical basis of olfactory discrimination, «Proc. Roy. Soc.», B 146, 299-319 (1957).
[4] GASSER H. S., Olfactory nerve fibres, «J. Gen. Physiol.», 39, 473-496 (1956).
[5] GEREBTZOFF M. A., L'olfaction. Structure de l'organe olfactif et mechanisme de l'olfaction, «J. de Physiol. et Pathol. Gener.», 45, 247-283 (1953).
[6] GEREBTZOFF M. A. e SHKAPENKO G., Recherches sur le pigment de la muqueuse olfactive, «C. R. Ass. Anat.», 68, 511-516 (1952).
[7] GESTELAND R. C., LETTVIN J. Y. e PITTS W. H., Chemical transmission in the nose of the frog, «J. Physiol.», 181, 525-559 (1965).
[8] GRAZIADEI P., Electron microscopic observations on the olfactory mucosa of the cat, «Experientia», 21, 274-275 (1965).
[9] GRAZIADEI P., Electron microscopic observations of the olfactory mucosa of the mole, «J. of Zool.» (in corso di stampa).
[10] LORENZO DE A. J., Electron microscopic observations of the olfactory mucosa and olfactory nerve, «J. Bioph. Biochem. Cytol.», 3, 839-850 (1957).
[11] OTTOSON D., Some, aspects of the function of the olfactory system, «Pharmacol. Rev.», 15, 1-42 (1963).
[12] REESE T. S., Olfactory cilia in the frog, «J. Cell. Biol.», 25, 209-230 (1965).
[13] SCARPA A., Anatomicae disquisitiones de auditu et olfacto (1789).
[14] SCHULTZE M., Ueber die Endigungsweise des Geruchsnerven und die Epitelgebilde des Nasenschleimhaut, «Monatsber. Akad. Wiss. Berlin», 21, 504-514 (1956).
Con il contributo del Ministero per i Beni e le Attività Culturali