When.com Web Search

Search results

  1. Results From The WOW.Com Content Network
  2. Histamine - Wikipedia

    en.wikipedia.org/wiki/Histamine

    It has been known for more than one hundred years that an intravenous injection of histamine causes a fall in the blood pressure. [30] The underlying mechanism concerns both vascular hyperpermeability and vasodilation. Histamine binding to endothelial cells causes them to contract, thus increasing vascular leak.

  3. Mast cell - Wikipedia

    en.wikipedia.org/wiki/Mast_cell

    Vasodilation and increased permeability of capillaries are a result of both H1 and H2 receptor types. [34] Stimulation of histamine activates a histamine (H2)-sensitive adenylate cyclase of oxyntic cells, and there is a rapid increase in cellular [cAMP] that is involved in activation of H+ transport and other associated changes of oxyntic cells ...

  4. Anaphylatoxin - Wikipedia

    en.wikipedia.org/wiki/Anaphylatoxin

    A-fragments form distinct structural domains of approximately 76 amino acids, coded for by a single exon within the complement protein gene. The C3a, C4a and C5a components are referred to as anaphylatoxins: [4] [5] they cause smooth muscle contraction, vasodilation, histamine release from mast cells, and enhanced vascular permeability. [5]

  5. Understanding the Vasodilation Process - AOL

    www.aol.com/lifestyle/understanding-vasodilation...

    Ways to enhance blood flow. For premium support please call: 800-290-4726 more ways to reach us

  6. Vasodilation - Wikipedia

    en.wikipedia.org/wiki/Vasodilation

    A new phase of vasoconstriction follows the vasodilation, after which the process repeats itself. This is called the Hunting reaction. Experiments have shown that three other vascular responses to immersion of the finger in cold water are possible: a continuous state of vasoconstriction; slow, steady, and continuous rewarming; and a ...

  7. Degranulation - Wikipedia

    en.wikipedia.org/wiki/Degranulation

    Degranulation is a cellular process that releases antimicrobial, cytotoxic, or other molecules from secretory vesicles called granules found inside some cells. It is used by several different cells involved in the immune system , including granulocytes ( neutrophils , basophils , eosinophils , and mast cells ).

  8. Histamine H2 receptor - Wikipedia

    en.wikipedia.org/wiki/Histamine_H2_receptor

    The histamine receptor H 2 belongs to the rhodopsin-like family of G protein-coupled receptors. It is an integral membrane protein and stimulates gastric acid secretion. It also regulates gastrointestinal motility and intestinal secretion and is thought to be involved in regulating cell growth and differentiation. [ 6 ]

  9. Histamine N-methyltransferase - Wikipedia

    en.wikipedia.org/wiki/Histamine_N-methyltransferase

    Histamine N-methyltransferase is encoded by a single gene, called HNMT, which has been mapped to chromosome 2 in humans. [5]Three transcript variants have been identified for this gene in humans, which produce different protein isoforms [6] [5] due to alternative splicing, which allows a single gene to code for multiple proteins by including or excluding particular exons of a gene in the final ...