The plasma Kakhungu: malire zobisika

moyo wa khungu amakhala zimatheka chifukwa michere osiyana ndi zinthu sizimayenderana, ndi khungu ndi wokhulupirika. Zonsezi zimatheka kupyolera zosiyanasiyana zimagwira ntchito zosiyanasiyana. selo A ambiri delimited zina dongosolo wapadera wotchedwa "cytoplasmic Kakhungu."

Kuoneka ngati zake ndi maso kuwala? Yankho ayi, inde, tikuona malire, koma nembanemba palokha - kapangidwe kwambiri zabwino. Nthawizina ife sitimakonda kuona malire selo Mwachitsanzo, pamene ankaona mu maso kuwala maselo chiwindi. Koma chifukwa ndiye ife tikuona nthawi zina malire khungu, kaya ndi Kakhungu?

Kwenikweni nadmembrannye zigawo za chakudya, amene ali pakati pa maselo. Iwo kuyamwa utoto, kotero inu mukhoza kuganiza kuti ichi ndi plasma imakhala ndi odulidwa bwino.

Mu zatsopano chinapezeka kuti maselo amene abatizidwa njira ndi kuthamanga osiyana osmotic, pathupi kapena usachite, kutanthauza kuti amacheza ndi Kakhungu amene amakhala ndi permeability kusankha.

Komanso zinawululidwa kuti selo nembanemba ndi bwino permeable, ngati kuyesera kulowa zinthu ndi sungunuka lipids. Mu Agiriki mfundo gidrofilnye itha la tinthu Kakhungu ankaona akukumana kunja ndi hydrophobic - mkati. Elekitironi wamamamayikirosikopu anasonyezanso kuti ndi ovuta kwambiri. Makamaka, zithunzi pakompyuta Tingaone kuti zigawo lakunja ndi wandiweyani, osati mkati, mwachitsanzo zamadzimadzi zigawo ili pa m'mbali.

The plasma Kakhungu kudzera chipangizo awo impermeable kuti macromolecules, mapuloteni kotero cytoplasmic sangathe kutuluka selo mu izo. Mapuloteni ndi muchipindachi, amalenga kuthamanga osmotic, kotero kuti kuchuluka kwa madzi limalowera mu khungu. Komabe, njira imeneyi si wopandamalire, chifukwa mu madzimadzi interstitial kuchokera kunja, palinso zinthu zina zimene kukwaniritsa kuthamanga osmotic.

Kuti kusiyana angathe anakhalabe khola Kakhungu plasmatic ayenera katundu dielectric. Iwo akutinso asayansi kuganiza kuti zambiri lipids Kakhungu, amene katundu dielectric. Monyinyirika limasonyeza ake katundu plasma Kakhungu.

Kapangidwe ndi ntchito zake imakhudzana, mwachitsanzo, ndi mphamvu zachilendo kukhala kusiyana mu woipa wa potaziyamu ndi sodium wochuluka ayoni amagwirizana ndi njira yapadera mu nembanemba wa - sodium wochuluka-potaziyamu mpope. Ion kutengerapo akutipatsa puloteni kuti opaleshoni maselo mphamvu, ndondomeko ndi okwera mtengo kwa izo. Selo lili ndi 'kupereka "chifukwa muyezo. Ziyeneranso "ndalama" ndi kulanda shuga, zidulo mafuta, amino zidulo.

Mbali chidwi selo nembanemba monga ndi asymmetric, ndiye pamalo ake mkati ndi kunja sizili zofanana, ngakhale ofufuza choyambirira pa maziko a deta elekitironi wamamamayikirosikopu tikambirana njira iyi. Ziwalo zonse zimam'patsa munali glycoprotein mamolekyulu protrude kupitirira pamwamba akunja nembanemba ndi zimakhudzidwa mapangidwe nadlipidnogo wosanjikiza. Pamwamba kunja kwa selo mulinso mamolekyulu wakupambulika dzinache zolandilira, kukhudza bwanji kuti tinthu tina chilengedwe. Choncho ntchito malamulo a khungu, izo ungawonjeze kapena kubisa kutengera zofuna za thupi. Ndipo mu gawo mkati nembanemba muli zambiri mafuta m'thupi.

maphunziro amuzolengedwa asonyeza maselo, mapuloteni kuti mkati ndi kunja nembanemba sali ofanana, koma phospholipids osiyana mu zikuchokera pamalo awa awiri ndi osiyanasiyana ndithu. Ena mwa zizindikiro zimenezi Tingaone ngakhale ndi elekitironi maso.

Monga mukuonera, nembanemba pulayimale si kophweka, koma kuti kumvetsa njira zonse, asayansi anali kumanga ndi kukana malingaliro ambiri.