Cov txheej txheem:
Video: Lub cell muaj dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Tag nrho hlwb Txawm hais tias lawv yog prokaryotic lossis eukaryotic, muaj tej yam nta. Cov yam ntxwv ntawm prokaryotic thiab eukaryotic hlwb yog: DNA, cov khoom siv noob caj noob ces muaj nyob rau hauv ib los yog ntau dua chromosomes thiab nyob rau hauv ib cheeb tsam nonmembrane bound nucleoid hauv prokaryotes thiab cov membrane-bound nucleus hauv eukaryotes.
Yog li ntawd, dab tsi yog 4 yam ntxwv ntawm cov hlwb?
Tag nrho cov hlwb muaj plaub yam sib xws:
- plasma membrane: ib txheej txheej uas cais lub cell sab hauv los ntawm nws ib puag ncig ib puag ncig.
- cytoplasm: ib tug jelly-zoo li cytosol nyob rau hauv lub cell uas muaj lwm yam cellular Cheebtsam.
- DNA: cov khoom siv ntawm tes.
- ribosomes: qhov twg protein synthesis tshwm sim.
Qhov thib ob, dab tsi characterizes lub cell? Cell , nyob rau hauv biology, lub hauv paus membrane-bound unit uas muaj lub hauv paus molecules ntawm lub neej thiab ntawm uas tag nrho cov muaj sia nyob yog tsim. Ib leeg cell yog feem ntau muaj cov kab mob ua tiav hauv nws tus kheej, xws li cov kab mob los yog cov poov xab. Txawm tias hlwb yog loj dua atoms, lawv tseem me heev.
Tom qab ntawd, ib tug kuj yuav nug, dab tsi yog 7 yam ntxwv ntawm cov hlwb?
Xya yam ntxwv ntawm lub neej muaj xws li:
- teb rau ib puag ncig;
- kev loj hlob thiab kev hloov pauv;
- muaj peev xwm yug me nyuam;
- muaj cov metabolism thiab ua pa;
- tswj homeostasis;
- ua los ntawm cov hlwb; thiab.
- hla cov yam ntxwv mus rau cov xeeb ntxwv.
Yuav ua li cas tag nrho cov cell muaj sib xws?
Txawm tias hlwb muaj ntau haiv neeg, tag nrho cov cell muaj qee qhov chaw hauv feem ntau . Cov khoom muaj xws li plasma membrane, cytoplasm, ribosomes, thiab DNA. Plasma membrane (tseem hu ua cell membrane) yog lub tsho nyias nyias ntawm lipids uas nyob ib puag ncig a cell.
Pom zoo:
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
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Lub luag haujlwm ntawm lub cell membrane yog dab tsi thaum lub sijhawm thauj mus los?
Lub cell membrane yog xaiv permeable rau ions thiab organic molecules thiab tswj kev txav ntawm cov khoom hauv thiab tawm ntawm lub hlwb. Lub luag haujlwm tseem ceeb ntawm cov cell membrane yog los tiv thaiv lub cell ntawm nws ib puag ncig. Nws muaj phospholipid bilayer nrog embedded proteins
Dab tsi yog 2 qhov tseem ceeb ntawm lub voj voog ntawm tes thiab dab tsi tshwm sim rau lub cell hauv txhua theem?
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Lub ntsiab lus ntawm cog cell thiab tsiaj cell yog dab tsi?
Tsiaj Thiab Nroj Tsuag Cell. Txhua yam muaj sia nyob, nroj tsuag lossis tsiaj txhu yog tsim los ntawm cov hlwb. Lub cytoplasm nyob rau hauv ib lub cell muaj chloroplast thiab lwm yam plastids, mitochondria, dictyosomes, ribosomes, du thiab ntxhib endoplasmic reticulum, nucleus thiab lwm yam. Ib tug tsiaj cell yog ntau dua los yog tsawg spherical