A jini membrane: boye iyakokin

rai na a cell zama zai yiwu ne kawai saboda daban-daban enzymes da kuma abubuwa ba Mix, da kuma cell ne kirki. Duk wannan shi ne kawai zai yiwu ta hanyar da dama membranes. A cell da aka kullum delimited daga sauran musamman tsarin mai suna "cytoplasmic membrane."

Gani ko ta wani haske microscope? Amsar da aka ba, eh, muna ganin iyaka, amma membrane kanta - ma kudin tsarin. Wani lokacin ba mu gani ko da cell kan iyakoki, alal misali, a lokacin da kyan gani, a cikin haske microscope da hanta Kwayoyin. Amma to, don me muke gani a wasu lokuta, cell kan iyakoki, ko yana da wani membrane?

A gaskiya ma shi nadmembrannye yadudduka na carbohydrates, wanda suke tsakanin sel. Sun sha da fenti, don haka za ka iya ganin cewa wannan ne jini membrane tare da wani cin nasara yanke.

A gwaje-gwajen an gano cewa Kwayoyin wanda aka nutsa cikin zurfin mafita tare da daban-daban osmotic matsa lamba, kumbura ko ƙyama, wanda ke nufin cewa suna kewaye da wata matattarar wanda aka halin zabe permeability.

An kuma bayyana cewa tantanin halitta membrane ne mai kyau-permeable, idan ta yi kokarin shigar da abubuwa da suke da narkewa a cikin lipids. A gargajiya ra'ayi gidrofilnye ƙare na membrane kwayoyin dauke ta m da hydrophobic - ciki. Electron bincike da madubin likita kuma ya tabbatar da cewa shi ne yafi wuya. A musamman, lantarki photos za a iya gani cewa m yadudduka ne m, kuma ba ciki, watau sia yadudduka located a gefuna.

A jini membrane ta hanyar da na'urar impermeable zuwa macromolecules, don haka cytoplasmic sunadarai ba su iya fita daga cikin cell ta hanyar da shi. A sunadarai ne a cikin cell, Yãna halitta osmotic matsa lamba, don haka da cewa dama adadin ruwa samun shiga cikin cell. Duk da haka, wannan tsari ne ba iyaka, saboda a cikin interstitial ruwa daga waje, kuma, akwai sauran abubuwa da sikẽli da osmotic matsa lamba.

Don m bambanci zauna barga plasmatic membrane kamata da dielectric Properties. Yana kuma nuna masana kimiyya su yi tunanin cewa da yawa daga membrane lipids, wanda da dielectric Properties. Ba tare da so ya bayyana da kaddarorin jini membrane.

A tsarin da ta ayyuka suna hade, msl, wani sabon abu iya aiki don kula da bambanci a cikin yawa na potassium da sodium ions ake dangantawa da wani musamman inji a cikin membrane - sodium-potassium famfo. Ion canja wuri haka samar da wani enzyme cewa aiki a kan makamashi Kwayoyin, da tsari ne m ga shi. A cell yana zuwa "biya" domin balance. Har ila yau bukatar "zuba jari" da kuma canja wuri na glucose, m acid, amino acid.

An ban sha'awa siffa daga cikin jikin tantanin kamar yadda shi ne asymmetric, cewa shi ne, ta ciki da kuma m saman ba daya suke ba, ko da yake asali masu bincike a kan tushen da electron bincike da madubin likita data bincika a wannan hanya. All sassa carbohydrate-dauke da glycoprotein kwayoyin protrude bayan da matsanancin surface na membrane kuma suna da hannu a cikin samuwar nadlipidnogo Layer. A matsanancin surface na cell ma ya ƙunshi musamman kwayoyin kira rabe, da suka shafi wasu kwayoyin da muhalli. Kamar wancan kayyade aiki na cell, shi zai iya ta da ko kashe dangane da jiki da bukatun. Kuma a cikin ciki na membrane ƙunshi mai yawa cholesterol.

Biochemical karatu sun nuna cikin jikin tantanin, sunadarai cewa ciki da kuma m membranes ba m, amma daban-daban phospholipids a cikin abun da ke ciki na wadannan biyu saman ma quite bambancin. Wasu daga cikin wadannan siffofin za a iya gani ko da wani na'urar hange.

Kamar yadda ka gani, da na farko membrane ba haka ba ne mai sauki, amma domin mu fahimci duk matakai, da masana kimiyya ya gina da su da su kãfirta da yawa shiriritar.