autocoid
Noun: A physiologically active substance that is produced within the body and acts locally, often having hormone-like effects. Autocoids are typically involved in regulating local physiological processes and are distinct from classical hormones that travel through the bloodstream to distant target organs.
The term "autocoid" is used in physiology and pharmacology to describe locally acting chemical messengers. It often refers to substances like prostaglandins, histamine, or serotonin, which are synthesized, act, and are inactivated in or near the same tissue.
- Histamine is a well-known autocoid involved in inflammatory and allergic responses.
- Researchers are studying the role of various autocoids in regulating blood flow at the site of an injury.
- The classification of certain signaling molecules as autocoids helps distinguish their local action from endocrine hormones.
- The concept of an autocoid emphasizes a substance's local origin and sphere of activity, contrasting with systemic hormones.
- In medical texts, you might encounter the phrase "autocoid substances" when discussing paracrine and autocrine signaling mechanisms.
- Autacoid: This is an alternative, less common spelling for "autocoid." The two terms are synonymous.
- Local hormone: This is a common descriptive synonym for an autocoid.
Local mediator, local hormone, paracrine factor.
The word "autocoid" has a single, specific meaning in biomedical science. It does not have common idiomatic or colloquial uses. Its definition is consistent with the provided reference context of being an internal secretion of uncertain classification, though modern usage often applies it to well-characterized local regulators.
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any physiologically active internal secretion especially one of uncertain classification
