Μηχανισμοί ελέγχου της κινητικότητας του πεπτικού σωλήνα των εντόμων
The present dissertation aims to further investigate the mechanisms of mobility of the insect digestive tract and focuses specifically on its last part, the posterior intestine, the rectum and the anus. For this purpose, the larva of Zophobas morio, the largest member of the Coleoptera (beetles), wa...
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Aristotle University Of Thessaloniki (AUTH)
2021
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fthedi:oai:10442/49915 2024-09-09T19:04:40+00:00 Μηχανισμοί ελέγχου της κινητικότητας του πεπτικού σωλήνα των εντόμων Regulatory mechanisms of the contraction in the insect digestive tract Zografou, Stella Ζωγράφου, Στέλλα 2021 http://hdl.handle.net/10442/hedi/49915 https://doi.org/10.12681/eadd/49915 gre gre Aristotle University Of Thessaloniki (AUTH) Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης (ΑΠΘ) doi:10.12681/eadd/49915 http://hdl.handle.net/10442/hedi/49915 Ηλεκτροφυσιολογία Έντομα Πεπτικό Νευροεπιστήμες Φυσιολογία Φυτοπροστατευτικές ουσίες Φαρμακολογία Οικοτοξικολογία Electrophysiology Insects Digestive Neurosciences Physiology Plant protection substances Pharmacology Ecotoxicology Βιολογία Φυσικές Επιστήμες άλλοι τομείς Biological Sciences Natural Sciences Biology miscellaneous PhD Thesis 2021 fthedi https://doi.org/10.12681/eadd/49915 2024-06-18T14:32:12Z The present dissertation aims to further investigate the mechanisms of mobility of the insect digestive tract and focuses specifically on its last part, the posterior intestine, the rectum and the anus. For this purpose, the larva of Zophobas morio, the largest member of the Coleoptera (beetles), was selected to be studied, which includes beetles with a huge zoogeographical distribution, in almost every part of the planet except Antarctica. The correct interpretation of the mechanisms of control of the mobility of the digestive tract of insects requires first the understanding of its structure. The structure of the digestive tract was investigated and was found to consist of anterior, middle and posterior intestine. It is innervated by the last abdominal ganglion of the Central Nervous System by the four sub-branches. The study of the mechanical activity of the isolated digestive tract (ex vivo) of the larva of Zophobas morio includes the characterization of the patterns of contraction of the muscles fibers of the esophagus and the posterior intestine, rectum and anus. The electrophysiological study focused on the posterior intestine, and the presence of pacemaker muscle cells in the areas of the rectum and anus was detected. These areas present spontaneous myogenic contraction. The determination of the role of the CNS in the control of the myogenic rhythm of the pacemaker regions of the posterior intestine has been extensively investigated. The systems of motor neurons that innervate the rectum and anus were identified. Also, the neural networks driving these motor neurons were identified as rectum and anus central pattern generators (CPG) and they are located in the last abdominal ganglion. The role of the mechano-receptors related with the rectum and anus was investigated. It appears that this sensory information has an important role in the control of the rectum and anus motor neurons affecting the force of the intestinal contraction. Also, our electrophysiological results indicate that the output of the CPG ... Doctoral or Postdoctoral Thesis Antarc* Antarctica National Archive of PhD Theses (National Documentation Centre Greece) |
institution |
Open Polar |
collection |
National Archive of PhD Theses (National Documentation Centre Greece) |
op_collection_id |
fthedi |
language |
Greek |
topic |
Ηλεκτροφυσιολογία Έντομα Πεπτικό Νευροεπιστήμες Φυσιολογία Φυτοπροστατευτικές ουσίες Φαρμακολογία Οικοτοξικολογία Electrophysiology Insects Digestive Neurosciences Physiology Plant protection substances Pharmacology Ecotoxicology Βιολογία Φυσικές Επιστήμες άλλοι τομείς Biological Sciences Natural Sciences Biology miscellaneous |
spellingShingle |
Ηλεκτροφυσιολογία Έντομα Πεπτικό Νευροεπιστήμες Φυσιολογία Φυτοπροστατευτικές ουσίες Φαρμακολογία Οικοτοξικολογία Electrophysiology Insects Digestive Neurosciences Physiology Plant protection substances Pharmacology Ecotoxicology Βιολογία Φυσικές Επιστήμες άλλοι τομείς Biological Sciences Natural Sciences Biology miscellaneous Zografou, Stella Ζωγράφου, Στέλλα Μηχανισμοί ελέγχου της κινητικότητας του πεπτικού σωλήνα των εντόμων |
topic_facet |
Ηλεκτροφυσιολογία Έντομα Πεπτικό Νευροεπιστήμες Φυσιολογία Φυτοπροστατευτικές ουσίες Φαρμακολογία Οικοτοξικολογία Electrophysiology Insects Digestive Neurosciences Physiology Plant protection substances Pharmacology Ecotoxicology Βιολογία Φυσικές Επιστήμες άλλοι τομείς Biological Sciences Natural Sciences Biology miscellaneous |
description |
The present dissertation aims to further investigate the mechanisms of mobility of the insect digestive tract and focuses specifically on its last part, the posterior intestine, the rectum and the anus. For this purpose, the larva of Zophobas morio, the largest member of the Coleoptera (beetles), was selected to be studied, which includes beetles with a huge zoogeographical distribution, in almost every part of the planet except Antarctica. The correct interpretation of the mechanisms of control of the mobility of the digestive tract of insects requires first the understanding of its structure. The structure of the digestive tract was investigated and was found to consist of anterior, middle and posterior intestine. It is innervated by the last abdominal ganglion of the Central Nervous System by the four sub-branches. The study of the mechanical activity of the isolated digestive tract (ex vivo) of the larva of Zophobas morio includes the characterization of the patterns of contraction of the muscles fibers of the esophagus and the posterior intestine, rectum and anus. The electrophysiological study focused on the posterior intestine, and the presence of pacemaker muscle cells in the areas of the rectum and anus was detected. These areas present spontaneous myogenic contraction. The determination of the role of the CNS in the control of the myogenic rhythm of the pacemaker regions of the posterior intestine has been extensively investigated. The systems of motor neurons that innervate the rectum and anus were identified. Also, the neural networks driving these motor neurons were identified as rectum and anus central pattern generators (CPG) and they are located in the last abdominal ganglion. The role of the mechano-receptors related with the rectum and anus was investigated. It appears that this sensory information has an important role in the control of the rectum and anus motor neurons affecting the force of the intestinal contraction. Also, our electrophysiological results indicate that the output of the CPG ... |
format |
Doctoral or Postdoctoral Thesis |
author |
Zografou, Stella Ζωγράφου, Στέλλα |
author_facet |
Zografou, Stella Ζωγράφου, Στέλλα |
author_sort |
Zografou, Stella |
title |
Μηχανισμοί ελέγχου της κινητικότητας του πεπτικού σωλήνα των εντόμων |
title_short |
Μηχανισμοί ελέγχου της κινητικότητας του πεπτικού σωλήνα των εντόμων |
title_full |
Μηχανισμοί ελέγχου της κινητικότητας του πεπτικού σωλήνα των εντόμων |
title_fullStr |
Μηχανισμοί ελέγχου της κινητικότητας του πεπτικού σωλήνα των εντόμων |
title_full_unstemmed |
Μηχανισμοί ελέγχου της κινητικότητας του πεπτικού σωλήνα των εντόμων |
title_sort |
μηχανισμοί ελέγχου της κινητικότητας του πεπτικού σωλήνα των εντόμων |
publisher |
Aristotle University Of Thessaloniki (AUTH) |
publishDate |
2021 |
url |
http://hdl.handle.net/10442/hedi/49915 https://doi.org/10.12681/eadd/49915 |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
doi:10.12681/eadd/49915 http://hdl.handle.net/10442/hedi/49915 |
op_doi |
https://doi.org/10.12681/eadd/49915 |
_version_ |
1809818695305789440 |