AMBIENTUM BIOETHICA BIOLOGIA CHEMIA DIGITALIA DRAMATICA EDUCATIO ARTIS GYMNAST. ENGINEERING EPHEMERIDES EUROPAEA GEOGRAPHIA GEOLOGIA HISTORIA HISTORIA ARTIUM INFORMATICA IURISPRUDENTIA MATHEMATICA MUSICA NEGOTIA OECONOMICA PHILOLOGIA PHILOSOPHIA PHYSICA POLITICA PSYCHOLOGIA-PAEDAGOGIA SOCIOLOGIA THEOLOGIA CATHOLICA THEOLOGIA CATHOLICA LATIN THEOLOGIA GR.-CATH. VARAD THEOLOGIA ORTHODOXA THEOLOGIA REF. TRANSYLVAN
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The STUDIA UNIVERSITATIS BABEŞ-BOLYAI issue article summary The summary of the selected article appears at the bottom of the page. In order to get back to the contents of the issue this article belongs to you have to access the link from the title. In order to see all the articles of the archive which have as author/co-author one of the authors mentioned below, you have to access the link from the author's name. |
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STUDIA BIOLOGIA - Issue no. 2 / 2005 | |||||||
Article: |
MODIFICĂRI STRUCTURALE ŞI ULTRASTRUCTURALE PRODUSE ÎN GLANDELE SUPRARENALE DUPĂ ADMINISTRAREA EXPERIMENTALĂ A VENINULUI DE ALBINE (APIS MELLIFERA L.) II. GLANDELE MEDULOSUPRARENALE. Authors: ADRIAN FLOREA, CONSTANTIN CRĂCIUN, CONSTANTIN PUICĂ. |
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Abstract: Structural and Ultrastructural Changes Produced in Adrenal Glands Consequently to the Honey Bee Venom Experimental Administration. II. The Adrenal Medula. An important aspect of the organism reaction to stressors involves the sympathoadrenal system, with the release of catecholamines from the adrenomedullary chromaffin cells. We reported here the histological and ultrastructural aspects of the epinephrine-secreting cells from adrenal medulla after the honey bee (Apis mellifera L.) venom subchronic treatment. We found hypertrophyc cells, and dilatation of capillaries on the background of the hypertrophy of the entire gland. At ultrastructural level, a high number of mature secretion granules was emphasized, as well as numerous immature granules widespread in the cytoplasm. Nuclei have an irregular shape, prominent nucleoli, and a very dilated perinuclear space. The endoplasmic reticulum and Golgi apparatus are also dilated. Small necrosis areas were observed besides capillaries with a compromised endothelium. All these changes prove that the bee venom is a powerful stressor agent generating an important reaction of the chromaffin cells. These cells have a general aspect characteristic to prolonged stress conditions, but they still keep an increased secretory activity. However, the high number of immature granules suggest an imminent physiological depletion of this gland.. | |||||||