Imibuzo Eyisibonelo Exoxa Ngohlelo Lokusebenza Kwama-hormone
Ama-hormone ayizinhlayiya ezibalulekile ezithonya cishe zonke izici zezinto eziphilayo. Akhiqizwa yizindlala ze-endocrine bese ekhishwa egazini ukuze afinyelele izitho nezicubu ezahlukahlukene. I-hormone ngayinye inomsebenzi othize, futhi ukusebenzisana kwayo okunamandla kulawula izinqubo ezahlukahlukene zomzimba. Ukuze sikuqonde kangcono lokhu, ake sibukeze ezinye izibonelo ezibonisa izindlela zokusebenza kwama-hormone bese sixoxa ngazo.
Umbuzo 1: Chaza ukuthi i-hormone insulin isebenza kanjani emzimbeni nokuthi iyithinta kanjani i-metabolism ye-glucose.
Ingxoxo:
I-insulin iyi-hormone ye-peptide ekhiqizwa amaseli e-beta eziqhingini zaseLangerhans kuma-pancreas. Le hormone idlala indima ebalulekile ekugayweni kwe-glucose. Umsebenzi wayo oyinhloko ukwehlisa amazinga kashukela egazini ngokukhuthaza ukumuncwa kwe-glucose emaseli, ikakhulukazi lawo asesibindini, emisipheni, kanye nasezicubu zamafutha.
Uma umuntu edla ukudla okunama-carbohydrate, amazinga kashukela egazini ayakhuphuka. Lokhu kwanda kubangela ukuthi ama-pancreas akhiphe i-insulin. I-insulin ibe isibopha kuma-receptor e-insulin olwelwesini lweseli, okubangela uchungechunge lwezimpendulo ngaphakathi kweseli. Omunye umphumela walokhu kusabela ukudluliselwa kwe-GLUT4, umthuthi kashukela, ebusweni beseli, okwenza kube lula ukungenisa ushukela esitokisini.
Esibindini, i-insulin ivuselela ukwakheka kwe-glycogen kusuka ku-glucose ukuze kugcinwe amandla isikhathi eside. Ngakolunye uhlangothi, i-insulin ivimbela i-gluconeogenesis kanye ne-glycogenolysis, ukwakheka kwe-glucose entsha kusuka kuma-substrates angewona ama-carbohydrate kanye nokuqhekeka kwe-glycogen ibe yi-glucose, ngokulandelana.
Ngaphezu kwalokho, i-insulin ithinta futhi i-metabolism yamafutha namaprotheni. Ezicutshini zamafutha, i-insulin ivimbela i-lipolysis, ukuqhekeka kwamafutha, futhi ivuselela i-lipogenesis, ukwakheka kwamafutha. Emisipheni, i-insulin ikhulisa ukumuncwa kwama-amino acid kanye nokwakheka kwamaprotheni.
Umbuzo 2: Ama-hormone e-thyroid ayithinta kanjani i-basal metabolism kanye nokukhula komzimba?
Ingxoxo:
Ama-hormone e-thyroid, okuhlanganisa i-thyroxine (T4) kanye ne-triiodothyronine (T3), akhiqizwa futhi akhiqizwe yi-thyroid gland. Womabili la ma-hormone aqukethe i-iodine futhi adlala indima ebalulekile ekulawuleni i-basal metabolism kanye nokukhula komzimba.
Ama-hormone e-thyroid athinta i-basal metabolism ngokwandisa izinga le-basal metabolic (BMR), okuyinani lama-calories umzimba owadingayo ukuze wenze imisebenzi eyisisekelo lapho uphumule. Lokhu kufezwa ngokwandisa ukusetshenziswa komoya-mpilo kanye nokukhiqizwa kokushisa emaseli, ikakhulukazi ezicutshini ezisebenzayo njengesibindi nemisipha. Ama-hormone e-thyroid akhulisa ukwakheka kwamaprotheni kanye nokuwohloka, kanye ne-carbohydrate kanye ne-fat metabolism, konke okufaka isandla ekwandeni kwe-BMR.
Ama-hormone e-thyroid adlala indima ebalulekile ekukhuleni nasekuhlukaniseni amaseli ngesikhathi sokuthuthukiswa. Abalulekile ekuthuthukisweni okuvamile kwesimiso sezinzwa esiyinhloko, ikakhulukazi ngesikhathi sokubeletha kanye nobuntwana. Ukuntuleka kwama-hormone e-thyroid ngesikhathi sokuthuthukiswa kungaholela ekubambezelekeni kwengqondo nangokomzimba, isimo esaziwa ngokuthi i-cretinism.
Umbuzo 3: Indlela yokuphendula engemihle ilawula kanjani ukukhiqizwa kwe-cortisol yehomoni emzimbeni?
Ingxoxo:
I-Cortisol iyi-hormone ye-glucocorticoid ekhishwa yi-adrenal cortex. I-Cortisol inemisebenzi eminingi ehlukahlukene, okuhlanganisa ukulawula i-glucose metabolism, ukucindezela impendulo yomzimba, kanye nokusiza umzimba ukuthi usabele ekucindezelekeni.
Ukukhishwa kwe-Cortisol kulawulwa ngendlela yokuphendula engemihle ehilela i-hypothalamus kanye ne-pituitary gland, eyaziwa ngokuthi i-hypothalamic-pituitary-adrenal (HPA) axis. Le ndlela iqala ngokukhishwa kwe-corticotropin-releasing hormone (CRH) kusuka ku-hypothalamus, evuselela i-anterior pituitary gland ukuthi ikhiphe i-adrenocorticotropic hormone (ACTH). I-ACTH bese ijikeleza iye ku-adrenal cortex, ivuselele ukukhishwa kwe-cortisol.
Uma amazinga e-cortisol ekhuphuka, le hormone inikeza impendulo engemihle ku-hypothalamus kanye ne-anterior pituitary gland, okunciphisa ukukhishwa kwe-CRH kanye ne-ACTH. Lokhu ekugcineni kunciphisa ukukhiqizwa kwe-cortisol, kugcina ibhalansi yama-hormone emzimbeni.
Uma le ndlela yokuphendula iphazamiseka, isibonelo ukucindezeleka okungapheli noma ukulimala kwengxenye eyodwa ye-axis ye-HPA, lokhu kungaholela ekukhiqizweni kwe-cortisol okweqile noma okuhlala isikhathi eside, okungaba nemiphumela emibi empilweni.
Umbuzo 4: Iyini indima ye-hormone aldosterone ekulawuleni umfutho wegazi kanye nokulinganisela koketshezi?
Ingxoxo:
I-Aldosterone iyi-hormone eyinhloko ye-mineralocorticoid ekhiqizwa yi-zona glomerulosa ye-adrenal cortex. Le hormone idlala indima ebalulekile ekugcineni ibhalansi ye-sodium, i-potassium, kanye nomfutho wegazi.
I-Aldosterone isebenza kakhulu kuma-distal tubules ezinso. Le hormone ivuselela ukumuncwa kabusha kwe-sodium namanzi egazini, okusiza ukwandisa umthamo wegazi, futhi ekugcineni, umfutho wegazi. Phakathi nale nqubo, i-potassium ikhishwa egazini, okusiza ukugcina ibhalansi efanele ye-ion emzimbeni.
Uhlelo lwe-renin-angiotensin-aldosterone (RAAS) luhlelo lokuphendula kwamahomoni olulawula ukukhiqizwa kwe-aldosterone. Lapho umfutho wegazi wehla, izinso zikhipha i-enzyme i-renin, eguqula i-angiotensinogen ibe yi-angiotensin I. I-Angiotensin I ibe isiguqulwa ibe yi-angiotensin II, evuselela ukukhiqizwa kwe-aldosterone futhi ibangele ukuvaleka kwemithambo yegazi, okwandisa umfutho wegazi.
Ukungahambi kahle kulesi simiso kungabangela ukuphazamiseka komfutho wegazi, njengomfutho wegazi ophakeme ngenxa ye-hyperaldosteronism, lapho kukhona ukukhiqizwa ngokweqile kwe-aldosterone.
I-Kesimpulan:
Izindlela zokusebenza kwama-hormone ziyinkimbinkimbi futhi zixhumene, zithinta cishe zonke izici zomsebenzi womzimba. Ukuqonda ukuthi ama-hormone asebenza kanjani kungasiza ekuxilongweni nasekuphathweni kwezimo ezahlukahlukene zezokwelapha. Ezibonelweni zezinkinga ezingenhla, sibukeze ukuthi i-insulin, i-thyroid, i-cortisol, ne-aldosterone zisebenza kanjani futhi zilawulwa kanjani emzimbeni, okuhlinzeka ngokuqonda ngezindima zazo ezibalulekile ekugcineni i-homeostasis.
