2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Ntses gills Ntses gills Cov txiaj ntsig ntawm qhov no yog tias cov ntshav ntws hauv cov hlab ntsha ib txwm ntsib cov dej uas muaj cov pa oxygen ntau dua, tso cai rau kev nthuav dav mus rau txhua txoj hauv kev ntawm lamellae. Raws li qhov tshwm sim, cov gills tuaj yeem rho tawm ntau dua 80% ntawm cov pa oxygen muaj hauv dej. https://en.wikipedia.org › wiki › Fish_gill
Ntses Gill - Wikipedia
siv tus qauv hu ua 'kev sib pauv pa oxygen' rau ua kom cov pa oxygen ntau tshaj plaws uas lawv cov ntshav tuaj yeem khaws tau. Lawv ua tiav qhov no los ntawm kev ua kom ntev npaum li lawv cov ntshav raug rau cov dej uas muaj cov pa oxygen ntau dua, txawm tias cov ntshav siv oxygen ntau dua.
Vim li cas kev sib pauv pauv hloov pauv tau zoo dua li kev sib pauv pauv tam sim no?
Qhov siab tshaj plaws ntawm cov cua sov lossis huab cua hloov pauv uas tuaj yeem tau txais yog siab dua nrog cov khoom siv hluav taws xob ntau dua li kev sib pauv tam sim no (parallel) vim tias countercurrent tswj qhov sib txawv qeeb qeeb lossis gradient (feem ntau qhov kub lossis qhov sib txawv).
Puas yog kev sib pauv pauv hloov pauv tau zoo?
Yog tias lub sijhawm sib cuag ntev txaus, ib nrab ntawm qhov sib txawv ntawm cov dej nkag thiab cov ntshav tuaj yeem hloov mus, uas yog, cov pa tawm mus kom txog thaum lub siab sib ntsib hauv nruab nrab. Ntawm qhov tod tes, lub tshuab hluav taws xob muaj peev xwm muaj qhov hloov pauv kev ua haujlwm ntawm 80% lossis ntau dua, nyob ntawm lub sijhawm tiv tauj.
Yuav ua li cascountercurrent system ua rau muaj txiaj ntsig pauv roj?
Ib qho ntawm txoj hauv kev uas pauv roj tau ua tiav yog los ntawm txoj cai ntws tawm. Suab nyuaj tab sis txhais tau hais tias dej thiab ntshav ntws mus rau qhov sib txawv. Cov dej uas hla lub gill lamellae ntws los ntawm cov ntshav mus rau hauv lub gill lamellae.
Dab tsi yog qhov zoo ntawm qhov ntsuas qhov ntsuas tam sim no?
Cov dej ntws tawm ua kom muaj qhov sib txawv siab tshaj plaws nyob rau tag nrho qhov ntev ntawm daim nyias nyias thiab tso cai rov qab los ntawm ib feem ntawm cov kuab tshuaj diffusive tshaj plaws thaum txo kev thauj mus los ntawm cov kuab tshuaj tsawg dua.
Pom zoo:
Qhov kev hloov pauv no puas yuav ua rau muaj kev hloov pauv hloov pauv?
Yog li, yog tias muaj kev hloov pauv, piv txwv li, kev ntxig lossis tshem tawm ntawm nucleotide, tshwm sim, qhov no tuaj yeem ua rau kev hloov pauv ntawm kev nyeem ntawv. Nws hloov tag nrho cov amino acid ib ntus. Cov kev hloov pauv no yog hu ua frameshift mutation (tseem hu ua kev nyeem ntawv hloov pauv, nyeem ntawv hloov pauv, lossis framing yuam kev).
Vim li cas kev hloov pauv hloov pauv tsim nyog lossis xav tau?
Ntawm Lub Hwj Chim Lub Zog Lub zog ntawm cov lus ceeb toom yuav tsum tau nce ntxiv kom nws thiaj li mus tau ntev dua. Qhov no yog qhov uas modulation yog qhov tseem ceeb. Qhov tseem ceeb tshaj qhov xav tau ntawm kev hloov kho yog txhawm rau txhim kho lub zog ntawm lub teeb liab yam tsis muaj kev cuam tshuam rau cov teeb meem ntawm lub teeb liab.
Qhov twg yog qhov kev hloov pauv hloov pauv hloov pauv?
Semiconservative replication piav qhia txog cov txheej txheem ntawm DNA replication nyob rau hauv tag nrho cov paub hlwb. DNA replication tshwm sim ntawm ntau lub hauv paus pib ntawm kev rov ua dua raws DNA qauv strand. Raws li DNA ob chav helix yog unwound by helicase, replication tshwm sim nyias ntawm txhua tus qauv strand nyob rau hauv antiparallel cov lus qhia.
Qhov kev hloov pauv twg yog xav tias yuav cuam tshuam los ntawm kev hloov pauv hloov pauv?
Dependent Variable Qhov sib txawv uas nyob ntawm lwm yam uas ntsuas. Cov kev hloov pauv no yuav tsum tau hloov pauv raws li qhov kev sim ua haujlwm ntawm tus kheej hloov pauv lossis hloov pauv. Nws yog cov nyhuv presumed. Qhov kev tshawb fawb hloov pauv twg yog qhov tshwm sim?
Los ntawm kev hloov pauv hloov pauv hloov pauv?
Kev hloov pauv hloov pauv hloov pauv (TMA) yog qhov isothermal (tsis hloov pauv nucleic acid kub), ib leeg-tube nucleic acid amplification system siv ob lub enzymes, RNA polymerase thiab thim rov qab kev sau ntawv. … Cov txheej txheem no tuaj yeem siv los tsom rau RNA thiab DNA.
