Definition

1. Noun:
   • The inner part of the adrenal gland: The adrenal medulla is the central core of the adrenal gland, which is located above each kidney.
   • An endocrine organ that secretes hormones: Specifically, it secretes the hormones epinephrine (adrenaline) and norepinephrine (noradrenaline) into the bloodstream, especially in response to stress.

Usage

• The term "adrenal medulla" is used in anatomical, physiological, and medical contexts to refer to a specific part of the endocrine system.
• It is typically used as a singular noun. The plural form is "adrenal medullas" or "adrenal medullae."

Examples

• Noun:
  • The adrenal medulla is responsible for the "fight-or-flight" response.
  • A tumor in the adrenal medulla can cause excessive secretion of adrenaline.
  • The study focused on the hormone production of the adrenal medulla.

Advanced Usage

• "Adrenal medulla" as a subject of study: Often discussed in endocrinology and neuroscience.
  • Research into the adrenal medulla has helped us understand acute stress responses.

Variants and Related Words

• Medulla: The inner region of an organ or tissue. (e.g., , )
• Adrenal cortex: The outer layer of the adrenal gland, which secretes different hormones like cortisol.
• Chromaffin cells: The specific hormone-secreting cells that make up the adrenal medulla.

Synonyms

• Medulla of adrenal gland: A more descriptive synonym.
• Adrenomedullary tissue: A technical term referring to the tissue of the adrenal medulla.

Related Phrases

• Adrenal medulla function: Refers to the physiological role of this organ.
  • The primary adrenal medulla function is catecholamine secretion.
• Adrenal medulla hormone: Refers to epinephrine or norepinephrine.
  • Epinephrine is the major adrenal medulla hormone.

Noun

1. the medulla of the adrenal gland; secretes epinephrine