Definition

1. Noun:
   • (Endocrinology) The primary organ most affected by a specific hormone. This is the organ whose cells have receptors for that hormone and whose function is most directly and significantly regulated or altered by it.

Usage

• The term is used in endocrinology and physiology to describe the specific site of action for a hormone.
• It is typically used in scientific, medical, and educational contexts.

Examples

• Noun:
  • The uterus is the target organ for the hormone estrogen.
  • In treating the condition, the drug is designed to act directly on the target organ.
  • Researchers are studying how the hormone signals its target organ to initiate a response.

Advanced Usage

• "Primary target organ": Used for emphasis to distinguish the main organ of action from other, less affected tissues.
  • While insulin affects many tissues, the liver is its primary target organ for regulating glucose storage.

Variants and Related Words

• Target tissue (n): A more general term that can refer to a specific tissue within an organ or a group of cells that are the site of hormone action.

  • The target tissue for parathyroid hormone is bone tissue.

• Target cell (n): The specific cell type within a target organ or tissue that possesses receptors for the hormone.

  • The hormone binds to receptors on the membrane of its target cell.

Synonyms

• Effector organ: An organ that carries out a response to a neural or hormonal signal.
• Site of action: The location where a hormone or drug produces its effect.

Related Concepts

• Hormone receptor: A protein on or in a target cell that binds to a specific hormone.
• Endocrine system: The system of glands that secrete hormones directly into the bloodstream to regulate the function of distant target organs.

Noun

1. (endocrinology) organ most affected by a particular hormone