Kutheni isikhumba sitshisa kwizinto ezichukumisayo

Umnxeba we-insect ehleli ekhumbeni inika i-tickling sensation, kwaye ngamanye amaxesha i-itch enzima. Le mpendulo iyaziwa ngokuba yi-mechanical itching, ayifakelwe yimichiza, ngokungafani nezinye iintlobo ze-pruritus ezibangelwa ukudibana nezilwanyana. Nangona iimeko zeekhemikhali zengxaki ziye zafundwa ngokubanzi kwizenzululwazi, isizathu sokuba "i-scabies" esicacileyo ingacacile. Kodwa ngoku abaphandi bakwazi ukulandelela umzekelo wokubonakala kweekhemikhali kunye nokuvuselelwa kwemishini.

Ukungahambi kakuhle kweekhemikhali

Ukuba umntu omnye ukhawuleza ingxaki yendawo encinci, ke omnye umntu unokukhawuleza le ndawo ngentukuthelo, kodwa ayithinteli uphawu. Kutheni oku kwenzekayo? Kubantu, kukho ukuhlukana okungafaniyo kunye nezixhobo zamachiza. Ngoko ke, i-antihistamines ijoliswe ekunciphiseni i-pruritus engalawulekiyo. Oogqirha bathi iimbali ze-histamine ezijongene nokuqhutywa kanzima. Nangona kunjalo, amaxesha onke amayeza anganceda ekuxazululeni ingxaki. Lo mbono wenza ukuba izazinzulu zicinge ngomnye umthombo we-pruritus engalawulekiyo. Mhlawumbi, kukho enye indlela yokudlulisa ulwazi kwingqondo.

Iqela elikhethekileyo lama-neuropeptides

Uphando olutsha luvule amehlo oososayensi. Kwi-neurons yentambo yomgogodla kukho indlela ekhethekileyo yokubakhoka kwe-mechanical. Ngoko, i-interneurons inoxanduva lokudlulisa ulwazi lweengqondo, olunika ulusu kwingqondo. I-neurotransmitter, okanye i-neuropeptide Y, kwaye yafunyanwa yizinzulu njengengaphakathi le-intanethi. Ngaphambili, izazinzulu zazi malunga nobukho bakhe emgodleni kunye nobuchopho, kodwa babengenakunyaniseka ngemisebenzi yakhe.

Amava kwintlanzi

Ngoku, abaphandi baphakamise ukuba i-neruropeptide Y inomsebenzi ofanayo no "lawulo lwesango." Iingcali zenzululwazi ziye zanyusa ngokukhethiweyo eli qela lala ma-neurotransmitters ukusuka kwintambo yomgogodla weentonga. Kwiiveki ezimbini kamva, iindonga zaqala ukukhanda umzimba wazo ngokungalawulekiyo, kwanokuba zisuka kumgca wokukhanya. Ngelo xesha, i-allergenic i-allergen ayizange ibangele impendulo. Olu vavanyo lwavumela oososayensi ukuba bazise iindlela ezihlukeneyo zokuvela kwezinto zamakhemikhali nezomculo.

Isiphelo

Iingcali azizange ziyeke ukufikelela kwisiphumo kwaye zaqhubeka. Ukufumanisa okulandelayo kukufumanisa ukuhluka kwesikhumba esiphathelene nekhanda, ehlanganiswe ngeenwele, kunye nekhanda eligqithiseleyo, umzekelo kwiintendelezo okanye ezinyaweni. Isikhumba esihlanganiswe ngeenwele, sivimbela iimpawu ezivela kwi-neurons. Oogqirha banethemba lokuba olu lwazi luya kunceda ekudaleni izidakamizwa ekunciphiseni ukubandezeleka kwabantu abanentsingiselo abavakalelwa ukungabikho kwe-neuropaptide Y.