Kungani isikhumba emibi kusukela touch ukukhanya

Ukuthinta isinambuzane, wahlala phansi esikhumbeni, kunikeza umuzwa tickling, futhi ukulunywa ngezinye izikhathi ezinzima. Cishe le ndlela yokusabela is njengoba ukulunywa mechanical eyaziwa, it is hhayi esibangelwa amakhemikhali, ngokungafani nezinye izinhlobo pruritus kubangelwa ukuthintana nezilwane. Nakuba aspect amakhemikhali nkinga iye kabanzi ufundwa ososayensi, imbangela "utwayi" mechanical kucacile kakhulu. Kodwa manje abacwaningi baye bakwazi ukulandelela umsuka kanye scheme of the chemical nokushukunyiswa lokukhanda.

Ukuzwela ezintweni chemical

Uma umuntu oyedwa kancane kuphela bhala inkinga endaweni yakhe, omunye umuntu khona-ke kwangathi ngentukuthelo ukunwaya indawo, kodwa akazange ekudambiseni uphawu. Kungani lokhu kwakwenzeka? Kubantu, kukhona ezifweni ezahlukene nomzimba namakhemikhali. Ngakho-ke, kalula ukulawula ukulunywa abizwa ngokuthi ama-antihistamine. Odokotela bathi uxhumano histamine yokuba ukulunywa ezinzima. Nokho, akubona bonke nemithi zingenawo amandla okusiza ekuxazululeni izinkinga. Lokhu okwashiwo yilo mlobi utshelwa ososayensi ukucabanga ngenye kokugqashuka imvelaphi ukulunywa ongalawuleki. Mhlawumbe, kukhona enye indlela ukuze adlulisele ulwazi ebuchosheni.

Iqembu olukhethekile neuropeptides

Ucwaningo olusha ososayensi uye wavula amehlo ami ngabona. I izinzwa of emgogodleni kukhona indlela esikhethekile ukuvela ukulunywa lokukhanda. Ngakho, interneurons banesibopho yokudlulisa ulwazi sezinzwa, okwenza isikhumba kuya ebuchosheni. Neurotransmitters, noma Y neuropeptide, futhi kwatholakala ososayensi kunombolo interneurons we nomgogodla. Ngaphambili, ososayensi wayesazi khona yayo kule asebuchosheni nomgogodla, kodwa babengazi ukuthi imisebenzi yawo ngokupheleleko.

Ucwaningo olwenziwa ngo-amagundane

Manje, abacwaningi baye bacabanga ukuthi neuropeptide Y lifana "control esangweni" umsebenzi. Ososayensi bebelokhu ngokukhetha isuswe leli qembu neurotransmitters kusukela igundane nomgogodla. Ngemva kwamasonto amabili, lo namagundane waqala ukunwaya umzimba ezimathonsi siqu ngisho nge touch ukukhanya. Ngesikhathi esifanayo, izinto ezixabana nomzimba enobuthi akuzange ukusabela ngaleyo ndlela. Lokhu experiment avunyelwe ososayensi ukusungula bahlukane okuvela ezintweni zamakhemikhali lokukhanda.

isiphetho

Ochwepheshe abayekanga futhi waqhubeka. Ukutholakala olandelayo kwaba kokutholakala umehluko touch ukukhanya isikhumba, embozwe izinwele, futhi isikhumba kahle bushelelezi, isibonelo ku izintende noma amathe ezinyawo. Isikhumba camera izinwele kuvimbela amasignali kusuka izinzwa. Odokotela banethemba lokuthi lolu lwazi uzokusiza ekudalweni izidakamizwa ukuze sinciphise ukuhlupheka kwabantu ebucayi, kukhona ukushoda neuropeptide Y.