Organelles: Alonda a Dongosolo la Ma Cellular
Zamoyo, kuyambira zazing'ono ngati mabakiteriya mpaka zovuta kwambiri monga anthu, zimapangidwa ndi mayunitsi oyambira a moyo otchedwa maselo. Ngakhale kuti maselo amabwera m'mitundu yosiyanasiyana komanso kukula kwake, onse ali ndi makhalidwe ofanana omwe amawathandiza kugwira ntchito ndikukhala ndi moyo. Chimodzi mwa zinthu zofunika kwambirizi ndi organelle, kapangidwe kapadera mkati mwa selo komwe kamagwira ntchito zinazake zofunika pa moyo wa selo.
Kodi Organelle ndi chiyani?
Ma organelle ndi mafupa omwe ali mkati mwa maselo omwe chilichonse chimakhala ndi ntchito yake yapadera. Amagwira ntchito ngati ziwalo zazing'ono (motero dzina lakuti "organelle") ndipo amaonedwa kuti ndi gawo lofunika kwambiri la kapangidwe ka maselo a eukaryotic. Mofanana ndi momwe ziwalo m'thupi la munthu zimagwirira ntchito zinazake, organelle iliyonse ili ndi gawo lake lenileni.
Mitundu ya Organelles
Nazi zina mwa ziwalo zazikulu zomwe zimapezeka m'maselo a eukaryotic a anthu ndi ntchito zawo:
1. Nyukiliyasi: Yodziwika kuti ndi malo olamulira a selo, nyukiliyasiyi imasunga zinthu za majini mu mawonekedwe a DNA. Ntchito yayikulu ya nyukiliyasiyi ndikuwongolera kukula kwa maselo, kagayidwe kachakudya, ndi kuberekana mwa kusunga ndi kukopera chidziwitso cha majini. Gawo lina lofunika kwambiri la nyukiliyasiyi ndi nukiliyasi, yomwe imayang'anira kupanga ribosome.
2. Mitochondria: Nthawi zambiri amatchedwa "malo amphamvu a selo," mitochondria ndi malo opumira maselo ndi kupanga ATP (adenosine triphosphate), molekyulu yayikulu yamphamvu yomwe maselo amagwiritsa ntchito. Ali ndi DNA yawoyawo ndipo akuganiziridwa kuti adachokera ku kholo la mabakiteriya akale.
3. Endoplasmic Reticulum (ER): ER ndi netiweki ya nembanemba zomwe zimakhudzidwa ndi kapangidwe ka mapuloteni ndi mafuta. Pali mitundu iwiri ya ER, yomwe ndi:
– Rough ER: Imaphimbidwa ndi ma ribosome ndipo imagwira ntchito yofunika kwambiri pakupanga mapuloteni.
– Smooth ER: Ilibe ribosomes ndipo imagwira ntchito popanga mafuta ndi kuchotsa poizoni m'thupi.
4. Golgi apparatus: Ili ndi udindo wosintha, kusanja, ndi kulongedza mapuloteni ndi mafuta kuti atuluke mu selo kapena kutumizidwa kumalo ena mkati mwa selo.
5. Lysosomes: Ili ndi ma enzymes ogaya chakudya omwe amaswa ma macromolecules m'zigawo zing'onozing'ono ndikubwezeretsanso zinthu zosweka za maselo.
6. Peroxisomes: Amagwira ntchito yofunika kwambiri pa kagayidwe ka mafuta m'thupi komanso kuchotsa poizoni m'thupi. Ziwalo zimenezi zimapanga ndikuswa peroxide, yomwe ndi chinthu chomwe chingayambitse kuwonongeka kwa kagayidwe ka maselo.
7. Ma Ribosome: Ngakhale kuti nthawi zambiri saganiziridwa kuti ndi ma organelle enieni chifukwa sazunguliridwa ndi nembanemba, ma ribosome ndi makina a molekyu omwe amapanga mapuloteni polumikiza ma amino acid mu dongosolo lomwe RNA imalangiza.
8. Ma chloroplast: Amapezeka m'maselo a zomera ndi algae okha, ma organelle awa ndi omwe amachititsa photosynthesis, kusintha mphamvu ya kuwala kukhala mphamvu ya mankhwala mu mawonekedwe a shuga. Ali ndi utoto wobiriwira wotchedwa chlorophyll.
9. Ma Vacuole: Ndi matumba osungiramo zinthu omwe angakhale ndi madzi, michere, kapena zinyalala. Mu maselo a zomera, vacuole yapakati imatha kulamulira kuchuluka kwa maselo ndipo imagwira ntchito yofunika kwambiri pakusunga kuthamanga kwa turgor.
Ntchito ndi Kufunika kwa Organelles
Ntchito za organelle iliyonse zimalumikizana kwambiri, zomwe zimapangitsa kuti maselo azikhala ndi moyo komanso kuberekana. Organelles zimathandiza kuti maselo azikhala ndi moyo komanso kuberekana. Organelles zimathandiza kuti zinthu zikhale zovuta monga kagayidwe kachakudya, kupanga zinthu zatsopano, kukonza ndi kuyika mamolekyu, komanso kugawa maselo.
Mwachitsanzo, mapuloteni opangidwa ndi ma ribosome mu rough ER amasinthidwa mu chipangizo cha Golgi. Mapuloteni awa amatha kugawidwa kwina mu selo kapena kutulutsidwa. Mitochondria imapereka mphamvu yofunikira pa njira zonse za kagayidwe kachakudya, pomwe ma lysosome amabwezeretsanso zigawo za maselo otayira, kuonetsetsa kuti maselo amagwira ntchito bwino komanso kuti sawononga ndalama zambiri.
Kusintha kwa Organelles
Limodzi mwa malingaliro ovomerezeka kwambiri pofotokoza chiyambi cha organelles ndi chiphunzitso cha endosymbiotic, chomwe chinaperekedwa koyamba ndi Lynn Margulis mu 1967. Chiphunzitsochi chimati organelles ena, makamaka mitochondria ndi chloroplasts, adachokera ku mabakiteriya akale omwe adalowa muubwenzi wogwirizana ndi maselo oyambirira a eukaryotic.
Malinga ndi chiphunzitsochi, selo loyambirira la eukaryotic linameza mabakiteriya a aerobic (pankhani ya mitochondria) kapena mabakiteriya a photosynthetic (pankhani ya ma chloroplast). M'malo mogaya mabakiteriyawa, selo lolandiralo linapereka malo okhazikika, pomwe mabakiteriyawa anali ndi ubwino wa kagayidwe kachakudya. Kwa zaka mamiliyoni ambiri za kukhala pamodzi kumeneku, mabakiteriyawa anakhala gawo la selo ndipo anasanduka organelles omwe timawadziwa lerolino.
Kafukufuku Wamakono ndi Organelles
Kuphunzira za organelles sikuti kwangowonjezera kumvetsetsa kwathu za sayansi ya maselo komanso kwatipangitsa kupita patsogolo kwambiri pa zaumoyo ndi sayansi ya zamoyo. Mwachitsanzo, kafukufuku wokhudza kusagwira bwino ntchito kwa mitochondrial wapereka chidziwitso pa matenda osiyanasiyana ofooka komanso oyambitsa kagayidwe kachakudya, kuphatikizapo matenda a shuga ndi matenda a mtima.
Pakadali pano, kupita patsogolo kwa sayansi ya zamoyo kwathandiza ofufuza kusintha ma organelle ndikusintha kuchuluka kwa ntchito zawo kuti apititse patsogolo kupanga zinthu zamoyo monga ma enzyme ndi mapuloteni a mankhwala.
Mapeto
Ma organelle ndi zinthu zofunika kwambiri pa moyo wa maselo, zomwe zimathandiza ntchito zofunika kwambiri mkati mwa zamoyo. Kumvetsetsa ntchito yawo ndi kusintha kwawo kumapereka chidziwitso chakuya pa momwe moyo umakhalira pamlingo wa mamolekyu. Kafukufuku wa ma organelle akupitilizabe kukhala ndi gawo lofunika kwambiri pakukula kwa ukadaulo wazachipatala ndi zamoyo, ndikuyika maziko a chithandizo chodzitetezera komanso chochiritsira mtsogolo. Kuphunzira ndi kumvetsetsa ma organelle sikuti kumangopatsa chidwi chathu cha sayansi komanso kumawonjezera luso lathu lokonza ndikuwonjezera thanzi la anthu.
