HISTOLOGICAL AND PHYSIOLOGICAL ASPECTS OF THE MEDULLA EXTERNA X ORGAN, A NEUROSECRETORY CELL GROUP IN THE EYESTALK OFPALAEMON SERRATUSPENNANT (CRUSTACEA, DECAPODA, NATANTIA)

Autor:	J. Manuel Denucé, Chantal Bellon-Humbert, François Van Herp, Godfried E. C. M. Strolenberg
Rok vydání:	1981
Předmět:	Cell type biology Decapoda Anatomy Vacuole biology.organism_classification Palaemon serratus Muscle hypertrophy Eyestalk medicine.anatomical_structure otorhinolaryngologic diseases medicine Axon General Agricultural and Biological Sciences Medulla
Zdroj:	The Biological Bulletin. 160:11-30
ISSN:	1939-8697 0006-3185
Popis:	The medulla externa X organ (MEX) is composed of two cell types containing two different categories of neurosecretory elementary granules also found in the sinus gland. Changes in the volume and activity of the organ were observed in relation to the intermolt cycle and season. After extirpation of the medulla externa X organ, the volumes of both the sinus gland and the organ of Bellonci increased in post- and intermolt stages. In the sinus gland, lysis and clumping were observed in axon endings containing one (large) granule type. Also as a consequence of the extirpation, large droplets were secreted in vacuoles of the organ of Bellonci. Neurosecretory cells in the medulla terminalis ganglionaris X organs (MTGX) showed increased activity and hypertrophy. The medulla externa X organ also had an impact on the distal retinal and chromatophoric red pigments.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f424d7c0dfc9a8b4439f4e06e8ab5157 https://doi.org/10.2307/1540897 Zobrazit plný text záznamu