Video: Lub tsev thaiv ntawm lub cell yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Tag nrho lub neej yog tsim los ntawm plaub lub tsev macromolecule: carbohydrates, lipids , cov proteins , thiab nucleic acids . Kev sib cuam tshuam ntawm cov polymers sib txawv ntawm cov qauv molecule yooj yim no ua rau feem ntau ntawm lub neej cov qauv thiab kev ua haujlwm.
Tsuas yog li ntawd, vim li cas cov hlwb hu ua lub tsev thaiv ntawm lub cev?
Cell yog lub hauv paus structural thiab fundamental unit ntawm lub neej. Nws yog lub npe hu ua tsev thaiv ntawm lub neej vim hais tias tag nrho cov kab mob yog tsim los ntawm hlwb . Lub cellular theem ntawm lub cev yog qhov uas cov txheej txheem metabolic tshwm sim uas ua rau lub cev muaj sia. Txawm tias thaum lub sij hawm faib thiab luam tawm, nws yog cell uas faib.
Qhov thib ob, dab tsi yog lub tsev blocks ntawm organelles? Tag nrho cov cellular organelles yog tsim los ntawm macromolecules xws li carbohydrates, lipids, Proteins, thiab Nucleic acids (DNA, RNA). Atoms - Ua kom macromolecules koom nrog txawm tias me dua tsev blocks . Tej zaum koj yuav tau hnov txog atoms ua ntej thiab lawv qhov chaw: neutrons, protons, thiab electrons.
Tom qab ntawd, ib tug kuj yuav nug, lub hlwb zoo li lub tsev blocks lossis cib?
Cells yog amazing. Lawv txhua tus ua los ntawm qhov zoo sib xws tsev blocks , tab sis lawv ua ntau yam sib txawv nyob ntawm seb lawv yuav ua li cas. Ib txhia hlwb nqa oxygen mus rau qhov chaw ntawm peb lub cev. Cells kuj ua lwm yam hlwb nyob rau hauv ib tug txheej txheem hu ua cell kev faib.
Muaj pes tsawg lub hlwb nyob hauv tib neeg lub cev?
Cov kws tshawb fawb xaus lus tias qhov nruab nrab tib neeg lub cev muaj kwv yees li 37.2 trillion hlwb ! Tau kawg, koj lub cev yuav muaj ntau lossis tsawg hlwb tshaj qhov tag nrho, nyob ntawm seb koj qhov loj npaum li cas piv rau qhov nruab nrab tib neeg yog, tab sis qhov ntawd yog qhov pib zoo rau kev kwv yees tus naj npawb ntawm hlwb hauv koj tus kheej lub cev !
Pom zoo:
Lub Tuam Tsev tau saib dab tsi ntawm nws thawj zaug mus rau qhov chaw pub zaub mov thiab lub tsev tua tsiaj?
Lub Tuam Tsev saib 50-52 txhiab tus nyuj nyuj, thiab nws kuj pom tias qee tus nyuj muaj suab nrov dua li lwm tus ntawm nws thawj zaug mus rau qhov chaw pub zaub mov thiab chaw tua tsiaj. Kuv xav tias lub tuam tsev txhais tau hais tias yog nyuj zoo ces kev lag luam yuav zoo thaum nws hais tias 'Kuv ntseeg tias qhov zoo rau nyuj yog qhov zoo rau kev lag luam
Ob qhov tseem ceeb ntawm lub voj voog ntawm tes yog dab tsi thiab dab tsi tshwm sim rau lub cell hauv txhua theem?
Muaj ob theem tseem ceeb hauv lub voj voog ntawm tes. Thawj theem yog interphase thaum lub cell loj hlob thiab replicates nws DNA. Qhov thib ob yog theem mitotic (M-Phase) thaum lub sijhawm cell faib thiab hloov ib daim qauv ntawm nws cov DNA mus rau ob lub hlwb zoo tib yam
Dab tsi yog 2 qhov tseem ceeb ntawm lub voj voog ntawm tes thiab dab tsi tshwm sim rau lub cell hauv txhua theem?
Cov xwm txheej no tuaj yeem muab faib ua ob qhov tseem ceeb: interphase (hauv nruab nrab ntawm kev sib faib theem ua pawg G1 theem, S theem, G2 theem), thaum lub xov tooj ntawm tes tsim thiab ua nrog nws cov haujlwm metabolic; mitotic theem (M mitosis), thaum lub sij hawm lub cell yog replicating nws tus kheej
Dab tsi yog lub tsev thaiv ntawm DNA thiab RNA lub npe hu ua?
Nucleotides yog cov molecules uas muaj nucleoside thiab phosphate pawg. Lawv yog lub hauv paus tsev blocks ntawm DNA thiab RNA
Dab tsi yog qhov flux los ntawm lub voos xwmfab ntawm sab yog tias tus nqi ntawm Q yog ntawm ib qho ntawm nws lub ces kaum?
Raws li peb paub tias, tag nrho cov flux los ntawm tus nqi q yog q / ε 0 (Gauss txoj cai). Yog hais tias tus nqi yog nyob rau ntawm lub ces kaum ntawm lub voos xwmfab, ib co ntawm cov flux nkag mus rau hauv lub voos xwmfab thiab tawm los ntawm ib co ntawm nws lub ntsej muag. Tab sis qee qhov flux tsis nkag mus rau hauv lub voos xwmfab. Qhov 1/8th no yuav muab faib ua 3 ntu dua