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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Cell & tissue research 135 (1972), S. 195-210 
    ISSN: 1432-0878
    Keywords: Adenohypophysis ; Bufo bufo larvae ; Chemical thyroidectomy ; Electron microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Résumé Différentes modifications peuvent être observées au niveau de la pars distalis de l'hypophyse du têtard de Crapaud après un traitement au PTU: 1. Apparition de cellules de thyroïdectomie, dont l'origine semble être les cellules glycoprotidiques de type II. 2. Activation des cellules protidiques de type I. Ce fait peut être mis en relation avec la croissance exagérée des têtards traités. 3. Après un traitement prolongé (4 mois) regranulation des cellules de thyroïdectomie et présence de nombreux lysosomes volumineux. 4. Absence de différenciation de 2 types cellulaires qui normalement apparaissent pendant la prométamorphose et le climax.
    Notes: Summary The following changes can be observed in the hypophysis pars distalis of the Toad's larvae after PTU treatment: 1. Formation of thyroidectomy cells, which seems originate from glycoprotein containing cells of type II. 2. Stimulation of the hormonal synthesis and release in the protidic cells of type I. This fact can be responsible for the excessive growth of the treated larvae. 3. Regranulation of the thyroidectomy cells after a long treatment (4 months) with, voluminous lysosomes in the regranulated cells. 4. Two cell types, which in the controls appear during prometamorphosis and climax, do not differentiate during the experiment time (5 months).
    Type of Medium: Electronic Resource
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