This lesson introduces the endocrine system and the role it plays in the maintenance of homeostasis.
The endocrine system works with the nervous system to regulate the activities critical to the maintenance of homeostasis. The following are the main functions of the endocrine system:
Chemical signals, or ligands, are molecules released from one location that move to another location to produce a response. Intracellular chemical signals are produced in one part of a cell, such as the cell membrane, and travel to another part of the same cell and bind to receptors, either in the cytoplasm or in the nucleus. Intercellular chemical signals are released from one cell, are carried in the intercellular fluid, and bind to receptors that are found in other cells, but usually not in all cells of the body.
Intercellular chemical signals can be placed into functional categories on the basis of the tissues from which they are secreted and the tissues they regulate.
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Which chemical signal would respond to the redness caused by an infected wound?