The toad adrenal gland
1968; Elsevier BV; Volume: 10; Issue: 3 Linguagem: Inglês
10.1016/0016-6480(68)90044-0
ISSN1095-6840
AutoresRamón Piezzi, Mario H. Burgos,
Tópico(s)Physiological and biochemical adaptations
ResumoIn this work we describe the seasonal changes occurring in the adreno-cortical cells of the toad Bufo arenarum Hensel. In summer, the gland presents wider cellular cords characterized by cells containing fewer lipid and cholesterol inclusions and maximal Δ5,3β-hydroxysteroid dehydrogenase activity. Under the electron microscope the summer gland shows a well developed smooth endoplasmic reticulum and numerous RNP particles, as well as dense mitochondria with occasional intramatrical granules. The winter gland, on the other hand, shows less developed smooth endoplasmic reticulum, larger and paler mitochondria, abundant lipid droplets, numerous lysosomes, particles of glycogen, and a poor Δ5,3β-hydroxysteroid dehydrogenase activity. The functional implications of these findings are discussed.
Referência(s)