Cov phospholipid bilayer phospholipid bilayer Cov kab mob lom neeg muaj cov txheej txheem txuas ntxiv ntawmlipid molecules nyob rau hauv uas membrane proteins yog embedded. Cov lipid bilayer no yog cov kua dej, nrog rau ib tus neeg lipid molecules tuaj yeem nthuav tawm sai sai hauv lawv tus kheej monolayer. Lub membrane lipid molecules yog amphipathic. Feem ntau yog cov phospholipids. https://www.ncbi.nlm.nih.gov › books › NBK26871
The Lipid Bilayer - Molecular Biology of the Cell - NCBI Bookshelf
- lub hauv paus structural unit ntawm biomembranes - yog qhov tseem ceeb impermeable rau feem ntau dej-soluble molecules, xws li qabzib thiab amino acids, thiab rau ions. Kev thauj mus los ntawm cov molecules thiab ions hla tag nrho cov cellular daim nyias nyias yog kho los ntawm kev thauj cov proteins cuam tshuam nrog lub hauv paus bilayer.
Dab tsi yog qhov tsis tuaj yeem nkag rau dej?
Ascending limb of loop of Henle is impermeable to water. Ntawm no cov dej tsis reabsorbed, es sodium, poov tshuaj, magnesium thiab chloride reabsorbed thiab yog li ntawd cov filtrate ua hypotonic rau ntshav plasma.
Qhov twg ntawm lub voj ntawm Henle tuaj yeem nkag mus rau dej?
Ntxoov ntxoo ntawm lub voj ntawm Henle yog permeable rau dej. Dej diffuses rau hauv hyperosmolar medullary interstitium.
Yuav ua li cas ntawm DCT?
Lub luag haujlwm ntawm DCT thaum ntxov yog kev nqus ntawm ions, suav nrog sodium, chloride thiab calcium. … Cov sodiumconcentration gradient generated tso cai rau sodium nkag mus rau hauv lub cell los ntawm lub lumen ntawm lub distal convoluted tubule, uas tshwm sim los ntawm NCC symporter (sodium-chloride cotransporter), nrog rau chloride ions.
Puas yog qhov sib npaug ntawm cov tubule permeable rau dej?
Raws li ALH tsis permeable rau dej, yuav muaj qhov nce hauv peritubular capillary osmolality. Thaum lub peritubular capillary los rau hauv kov nrog tus nqis nqis ntawm Henle (uas yog permeable rau dej), cov dej yuav ntws mus rau hauv peritubular capillary lumen tom qab osmolality gradient!
