Uyini umjikelezo we-circadian

-Delile

• I-Physiology yomjikelezo womuntu we-circadian
• Ukuphazamiseka kwesigqi se-circadian

Umzimba womuntu ulawulwa yiwashi langaphakathi lebhayoloji emisebenzini yalo yansuku zonke, njengoba kwenzeka ngezikhathi zokondla nezikhathi zokuvuka nezokulala. Le nqubo ibizwa ngokuthi umjikelezo we-circadian noma isigqi se-circadian, esinethonya elikhulu ekugayeni ukudla, ekuvuseleleni amaseli nasekulawuleni izinga lokushisa komzimba.

Umuntu ngamunye unewashi lakhe langaphakathi ngakho-ke abantu bahlukaniswe baba ngabantu basekuseni, okuyibo abavuka kusenesikhathi bavuke ekuseni kakhulu, abantu basemini, okuyibo abavuka sekwephuzile futhi balale sekwephuzile, futhi labalamuli.

I-Physiology yomjikelezo womuntu we-circadian

Isigqi se-circadian simele isikhathi samahora angama-24 lapho imisebenzi yomjikelezo womuntu ophothuliwe nalapho kulawulwa khona ukulala nesifiso sokudla. Isikhathi sokulala sithatha cishe amahora angama-8 kanti isikhathi sokuvuka sithatha cishe amahora ayi-16.

Emini, ikakhulukazi ngenxa yethonya lokukhanya, kukhiqizwa i-cortisol, ekhishwa yizindlala ze-adrenal futhi le hormone ngokuvamile iphansi ebusuku ngesikhathi sokulala futhi iyanda ekuseni, ukwandisa ukuphaphama emini. Le hormone ingakhuphuka nangezikhathi zokucindezeleka noma ibe phezulu ezimeni ezingamahlalakhona, ezingathikameza ukusebenza okufanele komjikelezo we-circadian. Bona ukuthi i-hormone i-cortisol yenzelwe ini.

Lapho kuhwalala, ukukhiqizwa kwe-cortisol kuyehla futhi kwenyuse ukukhiqizwa kwe-melatonin, esiza ukubanga ukulala, iyeke ukukhiqizwa ekuseni. Ngalesi sizathu, abanye abantu abanenkinga yokulala, bavame ukuthatha i-melatonin kusihlwa, ukusiza ukulala.

Ukuphazamiseka kwesigqi se-circadian

Umjikelezo we-circadian ungashintshwa kwezinye izimo, ongadala ukuphazamiseka kokulala futhi ubangele izimpawu ezinjengokulala ngokweqile emini nokuqwasha ebusuku, noma kubangele nezinkinga ezinkulu zempilo. Yazi ukuthi yiziphi izinkinga zomjikelezo we-circadian.