What type of cells are involved in the regulatory processes of the endocrine system?

The endocrine system is primarily composed of glands that secrete hormones, which are chemical messengers that regulate various physiological processes in the body. Glandular cells are specialized cells responsible for producing and releasing these hormones directly into the bloodstream. This secretion occurs without the need for ducts, differentiating them from exocrine glands, which release their products through ducts.

Glandular cells are found in various endocrine organs, such as the thyroid gland, adrenal glands, and pancreas, among others. Each glandular cell type is specialized for the synthesis and secretion of specific hormones, which play critical roles in functions such as metabolism, growth, reproduction, and homeostasis.

In contrast, nerve cells play a role in the nervous system and are primarily involved in the transmission of signals. Muscle cells are responsible for movement and contraction. Stem cells are undifferentiated cells that have the potential to develop into various cell types but do not have a direct role in hormone regulation. Therefore, glandular cells are the key players in the regulatory processes of the endocrine system due to their role in hormone production and secretion.