In vitro effects of certain neurohumors on ultrastructural change of the chick embryonic thyroid gland.

In vitro effects of certain neurohumors, on ultrastructure of 14 days old chick embryonic thyroid gland, has been studied. When the chick embryonic thyroid gland was cultivated in vitro, in the medium containing neurohumors like acetylcholine, adrenaline and histamine for a definite period in a particular sequence and dose, has resulted almost similar ultrastructural changes as seen in the hyperactive thyroid gland.