Forum Karczmy Bezdennego Kufla
Forum świata wyobraźni...
FAQ
Szukaj
Użytkownicy
Grupy
Galerie
Rejestracja
Profil
Zaloguj się, by sprawdzić wiadomości
Zaloguj
Forum Forum Karczmy Bezdennego Kufla Strona Główna
->
Sesje RPG
Napisz odpowiedź
Użytkownik
Temat
Treść wiadomości
Emotikony
Więcej Ikon
Kolor:
Domyślny
Ciemnoczerwony
Czerwony
Pomarańćzowy
Brązowy
Żółty
Zielony
Oliwkowy
Błękitny
Niebieski
Ciemnoniebieski
Purpurowy
Fioletowy
Biały
Czarny
Rozmiar:
Minimalny
Mały
Normalny
Duży
Ogromny
Zamknij Tagi
Opcje
HTML:
TAK
BBCode
:
TAK
Uśmieszki:
TAK
Wyłącz HTML w tym poście
Wyłącz BBCode w tym poście
Wyłącz Uśmieszki w tym poście
Kod potwierdzający: *
Wszystkie czasy w strefie EET (Europa)
Skocz do:
Wybierz forum
Ogólne
----------------
Forum Ogólne
Karczma
----------------
Informacje
Wolna Twórczość
RPG
----------------
Sesje RPG
Gildie
Dla PCtowców
----------------
MMORPG
cRPG
Inne
Off Topic
----------------
Off Topic
Kosz
----------------
Kosz
Przegląd tematu
Autor
Wiadomość
cheapbag214s
Wysłany: Nie 13:42, 17 Lis 2013
Temat postu: at least in evolutionary terms
Allergic response to bee stings may be evolutionary tactic gone wrong
PALO ALTO, Calif., Oct. 24 () -- Anaphylactic shock suffered by some people in reaction to a bee sting may be an evolutionary defense response gone haywire, U.S. researchers say.While a bee sting causes only temporary pain and discomfort for most people, for those with a bee venom allergy, the consequences can be devastating and sometimes fatal, as anaphylactic shock brings a drop in blood pressure, itchy hives and breathing problems.Now researchers at Stanford University report those severe allergic reactions may have an evolutionary explanation, centered on a process known as innate immune responses.When exposed to a foreign substance such as a pathogen or a toxic material like venom for the first time, immune cells called mast cells, which reside in most of the body's tissues, are poised to unleash signals that turn on defense responses when a pathogen or toxin intrudes.In allergic reactions, a type of antibody called IgE binds to the surface of mast cells and prompts them to initiate an adaptive immune response.It had been believed IgE might be required for protection against a lethal sting, and that allergies are an extreme,[url=http://www.godsdrama.com/]true religion outlet[/url], and maladaptive, example of this type of defense."Our findings support the hypothesis that this kind of venom-specific, IgE-associated, adaptive immune response developed, at least in evolutionary terms, to protect the host against potentially toxic amounts of venom, such as would happen if the animal encountered a whole nest of bees, or in the event of a snakebite," researcher Stephen Galli said."Anaphylaxis probably represents the extreme end of a spectrum of IgE-associated reactivity, which in some unfortunate individuals is either poorly regulated or excessively robust, so the reaction itself can become dangerous to them."
fora.pl
- załóż własne forum dyskusyjne za darmo
Powered by
phpBB
© 2001 phpBB Group
Chronicles phpBB2 theme by
Jakob Persson
(
http://www.eddingschronicles.com
). Stone textures by
Patty Herford
.
Regulamin