ADH

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Definition

Noun: 1. Antidiuretic hormone: A hormone that reduces urine production by increasing water reabsorption in the kidneys. It is secreted by the posterior pituitary gland and also by nerve endings in the hypothalamus. It also affects blood pressure by stimulating the contraction of small blood vessels (capillaries).

Usage
  • Medical/Physiological Context: This term is used almost exclusively in scientific, medical, and biological contexts to describe a specific bodily function.
    • The doctor explained that the patient's condition was due to a deficiency in ADH.
    • The release of ADH is triggered by dehydration or increased blood concentration.
Advanced Usage
  • Syndrome of Inappropriate Antidiuretic Hormone (SIADH): A clinical condition characterized by excessive, unregulated secretion of ADH, leading to water retention and low sodium levels in the blood.
    • Certain cancers can cause SIADH.
Variants and Related Words
  • Vasopressin: This is the more common scientific name for ADH. The two terms are used interchangeably.
    • Arginine vasopressin is another name for this hormone.
  • Antidiuretic: (Adjective) Describing a substance that suppresses urine formation.
    • It has a potent antidiuretic effect.
Synonyms
  • Vasopressin: The primary synonym.
  • Arginine vasopressin (AVP): A more specific biochemical name.
Notes
  • ADH is an initialism for "Antidiuretic Hormone." It is typically written in uppercase letters.
  • In clinical settings, the term vasopressin is often preferred.
Noun
  1. hormone secreted by the posterior pituitary gland (trade name Pitressin) and also by nerve endings in the hypothalamus; affects blood pressure by stimulating capillary muscles and reduces urine flow by affecting reabsorption of water by kidney tubules

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