Pituitary gland shine yake
Wadatacce
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Pituitary gland shine yake zurfin cikin kai. Ana kiran shi sau da yawa "master gland" saboda yana sarrafa yawancin abubuwan da sauran gland suke yi.
Kamar saman pituitary shine hypothalamus. Yana aika siginar hormonal ko lantarki zuwa pituitary. Waɗannan suna ƙayyade wane irin homon ɗin da pituitary zai saki.
Misali, hypothalamus na iya aikawa da wani hormone wanda ake kira GHRH, ko kuma haɓakar haɓakar hormone. Wannan zai haifar da sakin pituitary na haɓakar girma, wanda ke shafar girman tsoka da ƙashi.
Yaya muhimmancin wannan? Rashin samun wadataccen lokacin yarinta na iya haifar da sanyin jiki. Samun yawa zai iya haifar da akasin yanayin da ake kira gigantism. A cikin jikin da ya riga ya balaga, haɓakar girma da yawa na iya haifar da acromegaly. Tare da wannan yanayin, siffofin fuska suna da tsauri da tafiya; muryar tana kara zurfafawa; da kuma girman hannu, da kafa, da girman kwanya.
Wani umarnin daban na hormonal daga hypothalamus na iya haifar da sakin maganin kuzarin da ke motsa ka ko TSH. TSH yana haifar da thyroid don saki homon guda biyu da ake kira T3 da T4 wanda ke motsa metabolism a cikin wasu ƙwayoyin a cikin jiki.
Hakanan pituitary din yana iya sakin sinadarin hormone da ake kira antidiuretic hormone, ko ADH. Ana samar dashi a cikin hypothalamus kuma an adana shi a cikin pituitary. ADH yana shafar samar da fitsari. Lokacin da aka sake shi, kodan suna shan ƙarin ruwan da yake wucewa ta cikinsu. Wannan yana nufin ba a fitar da fitsari kaɗan.
Alkahol yana hana fitowar ADH, don haka shan giya yana haifar da ƙarin fitsarin.
Gland shine yake samarda wasu kwayoyin halittar wanda yake sarrafa wasu ayyuka da tafiyar jiki.
Misali, sinadarin motsa jiki na motsa jiki, ko FSH, da kuma luteinizing hormone, ko LH, su ne homonin da ke shafar ƙwai da kuma samar da kwai ga mata. A cikin maza, suna shafar gwaji da samarwar maniyyi.
Prolactin wani hormone ne wanda ke shafar ƙwayar nono a cikin uwaye masu shayarwa.
ACTH ko adrenocorticotrophic hormone yana haifar da adrenal gland don samar da abubuwa masu mahimmanci kama da steroid.
Girma, balaga, rashin sanyin jiki, har ma da jin ƙai kamar yunwa da ƙishirwa, kaɗan ne daga cikin hanyoyin da tsarin endocrine ke tasiri.
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