[Changes in the adrenocortical cells of the chick embryo after treatment with corticosterone or graft of a functional adrenal].

The ultrastructural changes of adrenocortical cells of the chick embryo, caused by administration of corticosterone or after grafting of an additional adrenal gland to the host chorio-allantoic membrane, were studied. The main cytoplasmic change is an increased amount of dense bodies and complex bodies. Arylsulphatase activity is detected in these bodies which should be included in the lysosome series. It is possible that a lysosomal mechanism may be active in the adrenocortical cells.