Qhov Tseem Ceeb - Cell Membrane vs Nuclear Membrane
Lub cell membrane, tseem hu ua plasma membrane yog qhov thaiv uas cais cov sab hauv ntawm tes los ntawm ib puag ncig sab nraud. Nws yog tsim los ntawm lipid bilayer thiab membrane proteins. Lub luag haujlwm tseem ceeb ntawm cov cell membrane yog los tiv thaiv lub cell los ntawm kev cuam tshuam. Nws tseem tiv thaiv cov kab mob hauv lub cev. Lub nucleus yog ib qho tseem ceeb tshaj plaws organelles pom nyob rau hauv eukaryotic hlwb. Ib lub hnab ntawv hu ua nuclear membrane ncig lub nucleus. Nuclear membrane tiv thaiv cov khoom siv caj ces ntawm eukaryotic cell. Qhov sib txawv tseem ceeb ntawm cov cell membrane thiab daim nyias nyias yog cov cell membrane encloses cytoplasm thiab cell organelles thiab yog ib tug lipid bilayer thaum nuclear membrane encloses lub nucleus thiab nws yog ua los ntawm ob lipid bilayer.
Cell Membrane yog dab tsi?
Cov cell membrane txhais tau tias yog cytoplasmic lipid bilayer uas nyob ib puag ncig lub protoplasm. Nws tseem hu ua plasmalemma. Lub cell membrane yog ib tug kab mob lom uas cais sab hauv ntawm tes los ntawm ib puag ncig sab nraud. Nws muaj cov lipid bilayer thiab embedded proteins. Cov embedded proteins yog peb hom; Ib qho proteins, peripheral proteins thiab transmembrane proteins. Nws kuj muaj cov rog tsis zoo xws li cov roj (cholesterol) thiab carbohydrates. Cov carbohydrates yog txuas nrog cov proteins lossis lipids (glycoproteins thiab glycolipids feem).
Lub luag haujlwm tseem ceeb ntawm cov cell membrane yog los tiv thaiv lub cell ntawm nws ib puag ncig ib puag ncig. Tsis tas li ntawd, nws tseem tiv thaiv cell organelles thiab tseem tswj kev txav ntawm cov khoom uas nkag mus rau hauv thiab tawm ntawm tes. Lub cell membrane yog xaiv permeable rau ions thiab organic molecules. Tsis tas li ntawd, nws koom nrog hauv cell adhesion, ion conductivity thiab cell signaling.
Daim duab 01: Lub Cell Membrane
Raws li cov kua dej mosaic qauv ntawm Singer thiab Nicolson (1972), lipid bilayer cell membrane yog dynamic, uas cov lipid thiab protein molecules diffuse ntau yooj yim. Nyob rau hauv cov nroj tsuag, lub cell membrane yog surrounded los ntawm ib tug nruj cell phab ntsa. Hauv cov kab mob gram-tsis zoo, lawv muaj cov plasma membrane uas nyob ib puag ncig los ntawm cov txheej txheem sab nrauv. Tab sis, lwm cov kab mob tsuas muaj cov plasma membrane xwb. Lub phab ntsa ntawm tes kuj nyob ib puag ncig cov kab mob cell membrane muaj peptidoglycan (amino acids thiab qab zib).
Nuclear Membrane yog dab tsi?
Lub hnab ntawv nuclear tseem hu ua lub hnab ntawv nuclear. Nws txhais tau tias yog ob chav lipid bilayer membrane uas nyob ib puag ncig cov khoom siv caj ces thiab nucleolus ntawm eukaryotic cell. Ob lub lipid bilayers yog hu ua inner nuclear membrane thiab sab nraud nuclear membrane. Qhov chaw nruab nrab ntawm ob daim nyias nyias no hu ua perinuclear qhov chaw. Qhov chaw yog kwv yees li 20-40 nm dav thiab nws txuas nrog sab hauv ntawm endoplasmic reticulum. Lub luag haujlwm tseem ceeb ntawm lub hnab ntawv nuclear yog los tiv thaiv cov khoom siv noob caj noob ces, thiab nws tseem koom nrog hauv kev thauj mus los ntawm cov khoom siv caj ces (xws li mRNA) hauv thiab tawm ntawm lub nucleus thaum lub sijhawm tsim cov protein.
Cov txheej txheem txheej txheej ntawm lub hnab ntawv nuclear sib koom ua ke nrog ciam teb nrog endoplasmic reticulum. Thiab cov ntaub so ntswg sab nraud muaj ntau dua cov proteins xws li "Nesprin". Nyob rau hauv lub hauv paus ntawm lub nucleoplasm, feem ntau yog nyob rau hauv cov ntaub so ntswg. Thiab nws yog npog los ntawm ib tug nuclear lamina. Lub nuclear lamina yog ib lub mesh ntawm nruab nrab filaments uas stabilizes lub hnab ntawv nuclear. Nws kuj suav nrog kev ua haujlwm chromatin nrog rau kev qhia.
Daim duab 02: Lub Nuclear Membrane
Nyob rau hauv eukaryotes, thaum lub sij hawm prometaphase ntawm lub cell division, lub nuclear membrane tawg, thiab nws hloov dua siab tshiab nyob rau hauv lub telophase. Lub nuclear membrane muaj ntau txhiab tus nuclear pore complexes. Lawv yog cov loj hollow proteins uas txuas sab hauv thiab sab nraud nuclear membranes. Nyob rau hauv cov tsiaj cov tsiaj, cov ntaub so ntswg nuclear tau rupturing thaum lub sij hawm interphase vim nuclear deformation, uas yog tom qab kho sai.
Dab tsi zoo sib xws ntawm Cell Membrane thiab Nuclear Membrane?
- Ob leeg yog tsim los ntawm lipid bilayers.
- Lub luag haujlwm tseem ceeb ntawm ob daim nyias nyias yog kev tiv thaiv thiab kev thauj mus los.
- Ob leeg tseem ceeb heev rau kev ciaj sia ntawm tes.
- Ob leeg muaj cov proteins hauv cov qauv.
Qhov txawv ntawm Cell Membrane thiab Nuclear Membrane yog dab tsi?
Cell Membrane vs Nuclear Membrane |
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| Cell membrane txhais tau tias yog cytoplasmic lipid bilayer membrane uas nyob ib puag ncig lub protoplasm ntawm cell. | Nuclear membrane txhais tau tias yog ob lub lipid bi txheej membrane uas nyob ib puag ncig cov khoom siv caj ces thiab nucleolus ntawm eukaryotic cell. |
| Qhov ntawm daim nyias nyias thiab pores | |
| Cell membrane yog ib daim nyias nyias uas tsis muaj pores. | Nuclear membrane yog ib daim nyias nyias uas muaj cov pores complex. |
| Cell membrane yog ib chav tsev membrane (ib lipid bilayer). | Nuclear membrane muaj ob chav tsev membranes (ob lipid bilayers). |
| Cell membrane persists thaum lub neej ntawm lub cell. | Nuclear membrane ploj thaum lub cell faib hauv prometaphase thiab hloov dua tshiab hauv telophase. |
| Permeability thiab Transportation | |
| Cov cell membrane yog semi-permeable membrane thiab tswj cov ndlwg ntawm cov tshuaj xws li ions, organic molecules ntawm protoplasm thiab lwm qhov chaw. | Cov ntaub ntawv nuclear tsuas yog permeable rau me me tsis-polar molecules (mRNA thiab cov proteins) thiab tswj cov dej ntws ntawm cov molecules ntawm nucleoplasm thiab cytoplasm. |
| YEndoplasmic Reticulum (ER) | |
| Lub endoplasmic reticulum tsis pom txuas nrog cell membrane. | Lub endoplasmic reticulum feem ntau pom muaj txuas nrog rau cov membrane nuclear. |
| YProkaryotic thiab Eukaryotic | |
| Cov cell membrane muaj nyob rau hauv ob qho tib si prokaryotic thiab eukaryotic kab mob. | Cov kab mob nuclear tsuas pom muaj nyob hauv cov kab mob eukaryotic xwb. |
Summary – Cell Membrane vs Nuclear Membrane
Cov daim nyias nyias yog qhov tseem ceeb ntawm lub cell. Lawv raug cais raws li cov cell membrane thiab organelles membranes. Lub cell membrane tseem hu ua plasma membrane (cytoplasmic membrane) thiab cais sab hauv ntawm tes los ntawm ib puag ncig sab nraud. Lub cell membrane yog tsim los ntawm lipid bilayer thiab embedded proteins. Lub cell membrane muaj complex lipids zoo li cov cholesterol thiab carbohydrates txuas rau nws. Lub luag haujlwm tseem ceeb ntawm cov cell membrane yog los tiv thaiv lub cell ntawm nws ib puag ncig. Nws tseem tiv thaiv cov kab mob hauv lub cev. Ntawm qhov tod tes, daim nyias nyias yog ob lub lipid bilayer uas nyob ib puag ncig nucleolus thiab chromatin ntawm lub nucleus. Nws tseem hu ua lub hnab ntawv nuclear. Nuclear membrane yog ib daim ntawv tsis tu ncua ua nrog ntau qhov pores, tsis zoo li cell membrane. Qhov no yog qhov txawv ntawm cell membrane thiab nuclear membrane.
Download PDF Version ntawm Cell Membrane vs Nuclear Membrane
Koj tuaj yeem rub tawm PDF version ntawm kab lus no thiab siv nws rau offline hom phiaj raws li daim ntawv ceeb toom. Thov download PDF version ntawm no Qhov txawv Ntawm Cell Membrane thiab Nuclear Membrane
