Piv txwv cov lus nug thiab kev sib tham txog kev sib kis yooj yim
Kev sib kis yooj yim yog ib txoj hauv kev rau kev thauj cov molecule hla cov cell membranes uas tsis xav tau lub zog, ua tsaug rau kev pab ntawm kev thauj cov protein. Cov txheej txheem no tso cai rau cov polar molecule lossis ions uas tsis tuaj yeem hla dhau lipid bilayer nkag mus lossis tawm hauv cell nrog kev pab ntawm cov channel protein lossis cov carrier protein. Hauv tsab xov xwm no, peb yuav tshuaj xyuas cov piv txwv ntawm cov teeb meem cuam tshuam nrog kev sib kis yooj yim thiab yuav daws lawv li cas.
Kev Txhais thiab Kev Taw Qhia
Ua ntej peb yuav tham txog cov teeb meem piv txwv, nws yog ib qho tseem ceeb kom nkag siab txog lub tswv yim yooj yim ntawm kev sib kis yooj yim. Yeej, kev sib kis yooj yim yog ib hom kev thauj mus los tsis siv zog, txhais tau tias cov molecule txav mus los hla lub membrane yam tsis tas yuav siv zog ATP. Qhov kev txav mus los no tshwm sim raws li qhov sib txawv ntawm qhov sib txawv, los ntawm qhov siab mus rau qhov sib txawv tsawg. Cov protein channel thiab cov protein carrier pab txhawb cov txheej txheem no los ntawm kev muab txoj hauv kev rau cov molecule hla lub membrane.
Cov Protein Channel thiab Cov Protein Carrier:
1. Cov Protein Channel: Ua haujlwm zoo li cov qhov hws lossis cov channel uas tuaj yeem qhib lossis kaw los tswj kev ntws ntawm qee cov molecule.
2. Cov Protein Carrier: Lawv khi rau qee cov molecule, hloov pauv lawv cov duab, thiab txav cov molecule hla daim nyias nyias.
Piv txwv lus nug 1
Lus Nug: Ib lub hlwb muaj qhov sib txawv ntawm cov sodium ions (Na+) nrog rau qhov sib txawv ntau dua sab nraum lub hlwb dua li sab hauv lub hlwb. Lub hlwb muaj cov protein sodium channel uas tso cai rau Na+ ions nkag mus rau hauv lub hlwb. Piav qhia txog kev sib kis yooj yim ua lub luag haujlwm li cas hauv cov txheej txheem no thiab teev cov yam ntxwv uas tuaj yeem cuam tshuam rau qhov nrawm ntawm kev sib kis yooj yim.
Kev Sib Tham: Nyob rau hauv cov xwm txheej no, Na + ions yuav txav mus rau hauv lub cell nqis qis dua qhov concentration gradient los ntawm sodium channels. Cov txheej txheem no tsis xav tau lub zog vim nws tshwm sim nqis qis dua qhov concentration gradient. Muaj ntau yam uas cuam tshuam rau qhov nrawm ntawm kev sib kis yooj yim suav nrog:
- Kev Ntsuas Qhov Sib Txawv: Qhov sib txawv ntawm qhov kev ntsuas ntau dua, qhov nrawm dua ntawm kev sib kis.
- Tus lej lossis Kev Txawj Ntse ntawm Cov Proteins Channel: Qhov ntau dua lossis yooj yim dua cov channel qhib, qhov ntau dua ntawm kev sib kis.
- Kub: Qhov kub nce ntxiv feem ntau ua rau cov haujlwm molecular thiab qhov nrawm ntawm kev sib kis.
- Qhov tshwj xeeb ntawm cov Channel lossis Carrier Proteins: Cov protein tsuas yog yuav pab txhawb kev sib kis ntawm qee cov molecules lossis ions uas phim lawv cov qauv lossis tus nqi.
Piv txwv lus nug 2
Lo lus nug: Koj tau txais cov ntaub ntawv hauv qab no hais txog ob hom protein nqa khoom, A thiab B, txhua tus pab thauj cov piam thaj hla lub cell membrane. Ntawm tib qhov concentration ntawm cov piam thaj, nws tau sau tseg tias protein A thauj cov piam thaj ob npaug sai dua li protein B. Sib tham txog cov laj thawj uas ua rau muaj qhov sib txawv no.
Kev Sib Tham: Muaj ntau yam ua rau muaj qhov sib txawv ntawm kev thauj mus los ntawm cov protein A thiab B:
- Kev Sib Txuas Lus: Protein A tej zaum yuav muaj kev sib txuas lus ntau dua rau glucose piv rau protein B, ua rau nws yooj yim dua los khi thiab thauj glucose.
– Kev Hloov Pauv ntawm Cov Qauv: Protein A yuav hloov pauv sai dua tom qab khi cov glucose, ua rau nws thauj tau ntau cov glucose tib lub sijhawm.
- Muaj Protein Los Yog Tus Nqi: Tej zaum yuav muaj protein A ntau dua nyob rau hauv daim nyias nyias piv rau protein B, yog li ntawd tus nqi ntawm cov piam thaj diffusion siab dua.
– Kev Tshwj Xeeb ntawm Cov Khoom Siv: Protein A tej zaum yuav tshwj xeeb dua rau hom glucose tshwj xeeb uas siv hauv kev sim piv rau protein B.
Kev Siv Hauv Lub Neej Txhua Hnub
Qhov tseeb, kev sib kis tau yooj yim ua lub luag haujlwm tseem ceeb hauv ntau cov txheej txheem ntawm lub cev, suav nrog kev nqus cov as-ham hauv txoj hnyuv thiab kev xa cov hlab ntsha. Piv txwv li, hauv txoj hnyuv, cov as-ham xws li glucose thiab amino acids raug thauj mus rau hauv cov hlwb epithelial hauv plab hnyuv nrog kev pab los ntawm kev sib kis tau yooj yim. Tsis tas li ntawd, kev thauj cov ions xws li Na +, K +, thiab Ca2 + hla cov hlwb ntawm cov hlab ntsha yog qhov tseem ceeb rau kev xa cov cim ntawm cov hlab ntsha.
Cov Kev Kawm Ntxiv
Kev Kawm Txog Qhov Teeb Meem: Cov qe ntshav liab tib neeg siv kev sib kis yooj yim los thauj cov piam thaj los ntawm cov ntshav. Xav txog tias qabzib yog qhov tseem ceeb ntawm lub zog hauv cov qe ntshav liab metabolism. Yuav ua li cas thaum muaj kev hloov pauv hauv cov protein nqa qabzib hauv daim nyias nyias ntawm cov qe ntshav liab?
Kev Sib Tham Txog Kev Kawm Txog Cov Ntaub Ntawv:
- Kev Txom Nyem ntawm Kev Ua Haujlwm ntawm Lub Zog: Yog tias muaj kev hloov pauv ua rau cov protein nqa khoom tsis ua haujlwm zoo rau kev thauj cov piam thaj, cov qe ntshav liab yuav tsis muaj zog txaus, ua rau lawv txoj haujlwm tsis zoo.
- Ua rau muaj ntshav tsis txaus: Nyob rau lub sijhawm ntev, kev txo qis ntawm kev thauj cov piam thaj tuaj yeem ua rau cov qe ntshav liab ua haujlwm tsis zoo thiab ua rau muaj ntshav tsis txaus.
- Kev Hloov Kho Metabolic: Cov cell yuav hloov lawv txoj kev ua metabolism kom hloov kho rau qhov txo qis ntawm cov glucose, txawm hais tias qhov no yuav tsis them tag nrho rau qhov tsis txaus.
Xaus
Kev sib kis tau yooj yim yog ib qho tseem ceeb uas tso cai rau cov molecule kom hla cov cell membranes tau zoo dua thaum lawv qeeb dua lossis tsis tuaj yeem hla cov lipid txheej ncaj qha. Los ntawm cov channel thiab cov carrier protein, cov cell tuaj yeem tswj tau yam nkag thiab tawm, tswj kev sib npaug. Kev nkag siab tob dua txog cov mechanism no pab cov kws tshawb fawb tsim cov kev kho mob thiab nkag siab zoo dua txog kev ua haujlwm ntawm cellular hauv ntau yam kab mob. Los ntawm cov piv txwv no cov teeb meem thiab kev sib tham, peb pom qhov tseem ceeb ntawm txhua lub molecule thiab protein hauv qhov nyuaj ntawm cov txheej txheem biological.
