Abaphuzi abangapheliyo Fumana ukuphulukisa ngakumbi kunzima
Abaphuzi bexesha elidlulileyo bangabonakala bephilile, kodwa ukuba bayagula okanye bayalimala, banokufumana kunzima ukuphilisa. Ukusetyenziswa kotywala kunokugxininisa kwi-hormone system kwaye utshintshe umzimba womzimba.
Ucwaningo lweSalk Institute lwezilwanyana zebhoratri lufumene ukuba ukusetyenziswa kotywala ixesha elide kungonakalisa amandla omzimba wokuphendula iingcinezelo ezifana nokugula okanye ukulimala.
Utywala obuninzi bunokubangela ukuba ugule ngokunciphisa amandla omzimba wakho, abaphandi bathi.
UCatherine Rivier, uprofesa kwi-Clayton Foundation Laboratories ye-Peptide Biology kwi-Salk Institute yaseLa Jolla, eCalif., Uhlolisise imiphumo yotywala kwimpendulo yoxinzelelo kwiiriti zelabhu. Elinye iqela leenkozi lalibonakaliswe kwimiphunga yotywala, ngelixa elinye, inani eliqhelekileyo leenki zikhonza njengeqela lokulawula.
Ukulwa okanye ukuPhupha
Iiliti zazingcoliswa kwimiphunga yotywala ngeeyure ezintandathu ngosuku ngosuku lweentsuku ezisibhozo. Zonke iicati zaye zaboniswa kwiintlobo ezimbini zokuxinzelela - ukutshatyalazwa kombane kunye nokujova kwe-toxin kunye namazinga abo e-hormonal.
Impendulo yokuxinezeleka, eyaziwa ngokuba yi-"fight-or-flight", iqaliswe kwingingqi yengqondo ebizwa ngokuba yi-hypothalamus, ehleli ngaphakathi phakathi kweengqondo.
Xa umzimba uphawulekile kumxinzelelo, i-hypothalamus ikhupha i-hormone ebizwa ngokuba yi- corticotropin-release release (CRF) kunye ne-vasopressin (VP).
La ma hormone amabini aya kwi-pituitary gland, eyenza ukugcinwa kwe-adrenocorticotropin (ACTH), kubikwa uRivier.
I-ACTH iya kwi-bloodstream kwaye ibangele i-adrenal glands ukuvelisa i-corticosteroids. Ezi khemikhali zenza ukuhanjiswa kwezondlo, njenge-glucose, kwiindawo zomzimba eziphantsi kwengcinezelo.
Ukuxinezeleka Kungabangela Ukugula
Kwiilaphu zokulawula, amazinga e-hormone ahlala eqhelekileyo kwaye kulindeleke. Kwiqela lotywala, amanqanaba e-CRF kunye ne-VP kunye nezimpendulo zamaselula kwi-hypothalamus zancipha kakhulu.
Ukuba amazinga e-CRF aphantsi, iimpendulo zomzimba aziyi kuba zanele ngexesha loxinzelelo, uRivier uthe. "I-CRF iyona nto ibalulekileyo ekuphenduleni kwethu uxinzelelo."
"Ukuxinezeleka kunokubangela ukugula ngokuguqula umzimba womzimba, njengokuba xa abafundi begula ngexesha lokuvavanya okanye xa abantu befa kwintsapho," kusho uDipak Sarkar, uprofesa, kwaye usihlalo weSebe lezululwazi kwizilwanyana zaseRuthgers.
Iziphumo zokuNxila kotywala
U-Rivier uthe ufuna ukuqhuba uphando oluthile malunga nokusetyenziswa kotywala-iincwadana, iirati ezisela ngokuzithandela. Izifundo ezidlulileyo zibonise ukungafani kwiibhokhwe zeerati ezazisela utywala ngokuzithandela kwaye abo, njengama-rats kulesi sifundo, banikezwa ngotywala ngaphandle kokukhetha.
"Ininzi yale nto thina nabanye esiyifumeneyo malunga nemiphumo yotywala ifunyenwe ukuba iyenze kubantu," esho.
Umthombo:
Rivier, CL, kunye al. "Ukubonakalisa ixesha elide kwiiNtshukumo zokuTywala eziNxilayo eziNgciniweyo ze-Hypothalamic Responsibility to Immune Signals and Non-Immune Signals." Utywala: Uphando lweKlinikhi noVavanyo ngoJanuwari 2000.