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endocrine cell
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Diagram of a typical endocrine cell showing labeled internal structures, including the nucleus, endoplasmic reticulum, Golgi apparatus, cytoplasm, and secretory granules, with arrows illustrating the pathway of hormone synthesis and exocytosis.
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endocrine cell

anatomy
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Diagram of a typical endocrine cell showing labeled internal structures, including the nucleus, endoplasmic reticulum, Golgi apparatus, cytoplasm, and secretory granules, with arrows illustrating the pathway of hormone synthesis and exocytosis.
Intracellular structure of a typical endocrine cell. The process of protein hormone synthesis begins when a hormone or an active metabolite stimulates a receptor in the cell membrane. This leads to the activation of specific molecules of DNA in the nucleus and the formation of a prohormone. The prohormone is transported through the endoplasmic reticulum, is packaged into secretory vesicles in the Golgi apparatus, and is ultimately secreted from the cell in its active, hormone form.

Endocrine cells are specialized cells that synthesize and secrete hormones, which are chemical messengers that regulate various bodily functions. These cells are organized into endocrine glands, such as the pituitary gland, adrenal glands, and pancreas. Some endocrine glands are distinct organs with defined borders, while others, like the islets of Langerhans in the pancreas, are microscopic clusters of cells embedded within other tissues.1

These cells play a crucial role in the endocrine system, a network of glands that work together to maintain homeostasis. The function of endocrine cells is essential for processes ranging from metabolism and growth to reproduction and stress response.1

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2 Britannica Sources
  1. human endocrine system - Anatomical considerations
  2. vertebrate - The endocrine system

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