Pinocytosis - ndi chiyani ichi?

Zakudya kulowa chilengedwe mkati selo kwa ndalama ya yogwira zoyendera amene anapezeka ndi michere wapadera. Pankhaniyi pali njira ziwiri - pinocytosis ndi phagocytosis.

General khalidwe la ndondomeko

Pinocytosis - ndi njira chilengedwe kudya, lomwe ndi khalidwe la zomera ndi nyama maselo. Kwenikweni umenewu chagona mu kukhudzana ndi zakudya selo mu mawonekedwe kusungunuka. Phagocytosis - zoterezi, koma pali chosakanikirana ndi particles olimba.

Amadziwika kuti pinocytosis ndi kuwalimbikitsa zofunika mapangidwe lysosomes, ndi phagocytosis ali pampando matenda a maselo ndi mavairasi. njira ziwiri izi ndi zambiri zofanana, choncho amachita pamodzi otchedwa - cytosis kapena endocytosis, pinocytosis zina zofala. Ngati chinthu M'malo mwake, zichokera kwa maselo, ndiye mmodzi ayankhula wa exocytosis.

Kulonga n'cigwagwa, tikhoza kunena kuti pinocytosis - ndondomeko mayamwidwe m'malovu selo madzi.

ndondomeko Features

Tsopano izo ziyenera kuti tawerenga selo ndi kutentha yozungulira ndipo sangathe unachitikira pa 2 ° C ndi pansi zochita za zoletsa kagayidwe kachakudya monga fluoride ndi sodium.

Mu pinocytosis anapanga outgrowths cytoplasm - pseudopodia, amene kuphatikiza ndi mzake ndi uzikuta m'malovu madzi. Pankhaniyi thovu anapanga, amene anasiyanitsidwa ndi selo nembanemba ndi ku ulendo wawo kudzera cytoplasm ndi, osatembenukira ku vacuoles otchedwa pinosomy.

Onani kuti pinocytosis - ndi zotsatira za maselo timakumana ndi HIV kuyimitsidwa. Mu nkhani iyi, vesicles anapanga muli vibrios. Ndi apa kuti nthawi zina timakumana ndi siteji ya "undressing". Pamene wogonjetsa mamolekyulu zikuluzikulu mankhwala munthu aliyense akudutsa kuwira mapangidwe ndi invagination - vacuole, koma limagwirira zoyendera mankhwala si kofunika. Wamkulu chikoka pa mayamwidwe wothandizila pharmacological ndi mawonekedwe awo, fineness, ndi pamaso pa matenda concomitant ziwalo m'mimba - gastritis kapena matenda a m'matumbo, mwachitsanzo, chironda chachikulu.

mapuloteni reabsorption mu tubules ndi aimpso

Pinocytosis - ndi njira yogwira mapuloteni reabsorption mu nephron proximal aimpso. Pa mapuloteni ake amamangirira malire burashi. Mu malo invaginated Kakhungu izi, chotero anapanga vial munali mapuloteni molekyulu. Pamene mapuloteni ili mkati kuwira, iwo amayamba kuwola ndinso kubwerera amino zidulo, amene kenako kugwa mwa Kakhungu basolateral mu madzimadzi extracellular. Popeza zoyendera amenewa amafuna mphamvu, umatchedwa yogwira.

Dziwani kuti pali mfundo zoyendera pazipita zinthu mwachangu reabsorbed. Zimenezi kugwirizana ndi kachitidwe pazipita katundu kayendedwe. Kumachitika pamene chiwerengero cha kugwirizana, ndinalowa mu lumen wa tubules ndi aimpso, kuposa mphamvu za ma enzyme ndi mapuloteni zoyendera nawo kulanda.

Mwachitsanzo, mukhoza Padzakhalanso mkhutu shuga reabsorption kuti akupezeka tubule proximal kumulowetsa. Ngati zili thunthu kuposa aimpso mphamvu zinchito, zimayamba kulekana mkodzo (shuga yachibadwa si wapezeka).

Tanthauzo la pinocytosis

Zimenezi zimachitika tubules ndi aimpso ndi epithelium matumbo. Ndiyenso amabweretsa mayamwidwe ndi reabsorption mankhwala ambiri (kuphatikizapo mapuloteni ndi mafuta) kuti m'pofunika kuti uziyenda yachibadwa ya thupi.

Komanso, pamene akudutsa pinocytosis kagayidwe khoma capillary. Choncho, mamolekyulu lalikulu lomwe sangalowerere mwa pores ziwiya kakang'ono ka magazi, natengedwa ndi pinocytosis. Pankhaniyi capillary Kakhungu ndi invaginated maselo, potero kupanga vacuole amene wazungulira molekyulu. Pa tsidya lina la khola ndondomeko zosiyana uyamba malo - emiocytosis.

Izo ziyenera kunenedwanso kuti pinocytosis - ndi Mbali yofunika zoyendera yogwira ion ndi ntchito. Kuti limagwirira waukulu malowedwe mu chilengedwe mkati mwa zinthu mkulu maselo maselo. Komanso ndi njira yaikulu ya malowedwe a nyama kapena mbewu mavairasi mu selo khamu.