Studies on the Fine Struture of the Thyroid Gland and its Secretory Mechanism with Electron Microscope

Abstract

In the course of the electron microscopic study in the correlation between the structure and the function of the endoplasmic reticulum, the present paper discusses the secretory mechanism of the epithelium in the thyroid gland.
1) The endoplasmic reticulum of the epithelium in the thyroid gland consists of the three layered membranous structure.
2) During hypoactivity of the gland, the flattening of the follicular cell and the endoplasmic reticulum is disposed with the regularity of its three layered membranous structure.
3) In the hyperactivity of the gland, the increased height of the epithelium. And the endoplasmic reticulum dilates and stores the secretory product in its cavity and becomes transform into the colloid droplet.
4) The attached particles on the outer smooth surfaced memberane free and scatter in the cytoplasm by the alternating of the potential of the surfaced memberane.