internal secretion
Học thuậtThân thiện
The pancreas releases an internal secretion called insulin into the bloodstream.
Definition
- Noun:
- A hormone: A chemical substance produced by an endocrine gland, released directly into the bloodstream, and carried to target tissues or organs where it exerts a specific regulatory effect.
Usage
- The term "internal secretion" is a technical, somewhat dated synonym for "hormone." It is used to describe a substance secreted internally, contrasting with "external secretions" like sweat or digestive juices that are released outside the body or into body cavities.
- It is primarily used in biological, medical, and endocrinological contexts.
Examples
- Noun:
- Insulin is a crucial internal secretion that regulates blood sugar levels.
- The study focused on how internal secretions control growth and metabolism.
Advanced Usage
- "Theory of internal secretions": A historical term referring to the early study of endocrinology.
- The work of Bayliss and Starling on secretin was foundational for the theory of internal secretions.
Variants and Related Words
- Hormone (n): The modern and more common term for an internal secretion.
- Adrenaline is a hormone that prepares the body for 'fight or flight'.
- Endocrine (adj): Relating to glands that secrete hormones directly into the bloodstream.
- The pituitary is a major endocrine gland.
Synonyms
- Hormone: Chemical messenger.
- Chemical messenger: A substance that carries signals between cells.
Related Phrases
- Endocrine secretion: A phrase synonymous with internal secretion, emphasizing its origin from ductless glands.
- Thyroxine is an endocrine secretion from the thyroid gland.
The pancreas releases an internal secretion called insulin into the bloodstream.
Noun
- the secretion of an endocrine gland that is transmitted by the blood to the tissue on which it has a specific effect