Qhov Tseem Ceeb Qhov txawv - Ion Channel vs Transporter
Lub cell nyob tsis tu ncua koom nrog kev thauj mus los ntawm cov molecules xav tau rau cov haujlwm ntawm tes thiab ions hauv ntau txoj hauv kev. Cov hlwb tau txais cov molecules thiab ions los ntawm lawv cov kua dej nyob ib puag ncig txhawm rau txhawm rau tswj lub cell kev ncaj ncees. Yog li, nws tuaj yeem pom tsis tu ncua kev khiav tsheb hauv cov plasma membrane. Ions xws li k+, Na+, Ca+ thiab cov molecules xws li qabzib, ATP, proteins, m-RNA tsis tu ncua txav mus rau hauv thiab tawm ntawm lub cell. Molecules thiab ions yog txav mus hla ib daim nyias nyias raws li tus thawj coj ntawm diffusion (particle txav los ntawm cheeb tsam ntawm ntau dua concentration mus rau ib cheeb tsam ntawm qis concentration) uas yog hu ua passive tsheb thauj mus los. Tab sis qee zaus, cov molecules thiab ions tau tsiv tawm tsam lawv cov concentration gradient uas yog hu ua kev thauj mus los uas tau txais kev txhawb nqa los ntawm ATP. Cov lipid bilayers yog impermeable rau feem ntau ntawm cov molecules thiab ions (tshwj tsis yog dej, O 2, thiab CO 2) thiab nws yog qhov kev txwv loj. ntsib nyob rau hauv kev thauj mus los ntawm molecules thiab ions hla ib tug kab mob lom. Yog li, kev thauj mus los thiab kev thauj mus los tsis zoo ntawm cov molecules thiab ions hla daim nyias nyias yog qhov tseem ceeb heev rau cov nyob hauv hlwb. Qhov sib txawv tseem ceeb ntawm ions channel thiab transporter tuaj yeem piav qhia raws li ion channel tau koom nrog hauv kev thauj mus los ntawm ions. Ntawm qhov tsis sib xws, cov neeg thauj khoom tau koom nrog hauv kev thauj mus los ntawm ions los ntawm kev noj ATP.
Ion Channel yog dab tsi?
Cov ion channel receptors yog cov protein ntau ntau so thiab nyob ntawm cov ntshav plasma. Txhua yam ntawm cov proteins no yog teem rau hauv ib txoj kev uas lawv tsim pore extending passageway ntawm ib sab ntawm daim nyias nyias mus rau lwm qhov. Cov kab no hu ua ion channels. Ion channels muaj peev xwm qhib thiab kaw raws li tshuaj lom neeg, hluav taws xob thiab cov khoom siv hluav taws xob uas lawv tau txais los ntawm tes sab nraud.
Daim duab 01: Ion Channel
Lub ion channel qhib yog ib qho kev tshwm sim sai sai. Qhov no tsuas siv ob peb milliseconds xwb. Tom qab ntawd lawv kaw thiab nkag mus rau theem so uas lawv tsis teb rau cov teeb liab rau lub sijhawm luv luv. Ion channels tsuas tuaj yeem txav ions mus rau hauv lawv cov concentration gradient (los ntawm ntau dua concentration mus rau qis concentration). Yog ib lub ion channel qhib lub ions (k+, Na+, Ca+) yuav ntws mus rau thaj tsam uas lawv cov concentration qis tshaj. Thaum lub neurotransmitter khi rau ib qho ionotropic receptor, nws hloov cov duab thiab tso cai rau cov ndlwg ntawm ions. Qhov no yog hu ua ligand-gated ion channel. Xwb, qee qhov ion channel tau qhib los ntawm kev hloov pauv hluav taws xob hla daim nyias nyias. Qhov no yog hu ua voltage-gated ion channels. Ion channels tau hais tias tsis muaj zog vim tsis xav tau lub zog (ATP) yuav tsum tau qhib cov protein. Tsuas yog qhov ligand lossis hloov pauv hauv qhov hluav taws xob yog xav tau.
Ion Transporter yog dab tsi?
Nyob rau hauv cov tshuaj lom neeg, cov protein thauj khoom yog trans membrane protein uas txav ions hla cov plasma membrane tiv thaiv lawv cov concentration gradient los ntawm cov txheej txheem ntawm kev thauj mus los. Thawj cov khoom thauj khoom yog cov enzymes zoo li ATPase. Tom qab ntawd cov thawj thauj khoom thauj khoom no hloov lub zog khaws cia hauv ATP molecules txhawm rau hloov ions los ntawm qis dua mus rau siab dua.
Daim duab 02: Ion Transporter
Tseem muaj cov thauj khoom thib ob. Tsis zoo li thawj tus thauj khoom uas siv lub zog ATP los tsim kom muaj kev sib xyaw ua ke, cov thauj khoom thib ob yog siv lub zog los ntawm cov concentration gradient tsim los ntawm cov thawj thauj khoom. Sodium-chloride symporter thauj ion nrog nws cov concentration gradient. Lawv ua ke cov kev thauj mus los ntawm cov molecule thib ob hauv tib txoj kev. Antiporters kuj siv cov concentration gradient, tab sis cov molecule ua ke yog thauj mus rau opposite direction.
Dab tsi zoo sib xws ntawm Ion Channel thiab Transporter?
- ob leeg yog protein molecules.
- Ob leeg thauj ions hla lub plasma membrane.
- Ob leeg pab tau kom muaj kev ncaj ncees ntawm tes.
- Ob leeg muaj txiaj ntsig hauv kev thauj cov ions tseem ceeb (k+, Na+, Ca+) nyob rau hauv thiab tawm ntawm daim nyias nyias thiaj li tswj tau lawv qhov xav tau ion concentration sab hauv thiab sab nraud ntawm tes.
Qhov txawv ntawm Ion Channel thiab Transporter yog dab tsi?
Ion Channel vs Transporter |
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| Ion channel yog ib qho pore-forming membrane protein uas tso cai rau ions mus rau hauv lub pore channel. | Transporter yog cov protein ntau transmembrane uas txav ions hla lub plasma membrane tiv thaiv lawv cov concentration gradient los ntawm kev thauj mus los. |
| Ion Tsheb thauj mus los | |
| Ion channel thauj ions los ntawm ntau dua concentration mus rau qis concentration. | Tus neeg thauj khoom thauj ions los ntawm qis qis mus rau siab dua. |
| hom kev thauj mus los ion | |
| Ion channel cuam tshuam nrog kev thauj mus los ntawm ion passive. | Kev thauj mus los cuam tshuam nrog kev thauj mus los. |
| siv ATP | |
| Ion channel tsis siv lub zog ATP. | Tus neeg nqa khoom siv lub zog khaws cia hauv ATP molecules. |
| Ion txoj kev thauj mus los | |
| Ion channel siv lub ligand lossis hloov pauv hauv qhov hluav taws xob hla lub membrane kom thauj ions. | Tus neeg nqa khoom siv thauj khoom thawj thiab theem nrab thauj ions. |
| Kev taw qhia | |
| Ion channel txav ions nqes qhov concentration gradient. | Tus thauj khoom txav ions tawm tsam qhov kev sib tw gradient. |
Summary – Ion Channel vs Transporter
Lub xovtooj txuas ntxiv txuas ntxiv mus rau kev thauj mus los ntawm cov khoom tsim nyog hauv thiab tawm ntawm lub xovtooj ntawm ntau txoj hauv kev. Cov hlwb tau txais cov molecules thiab ions los ntawm lawv cov kua dej nyob ib puag ncig txhawm rau txhawm rau tswj lub cell kev ncaj ncees. Nws tau pom tias tsis muaj kev thauj mus los hauv plasma membrane. Ions xws li k+, Na+, Ca+thiab cov molecules xws li qabzib, ATP, proteins, m-RNA tsis tu ncua txav mus rau hauv thiab tawm ntawm lub cell. Active thiab passive kev thauj mus los yog ob hom uas cov hlwb thauj ions hla lub plasma membrane. Ion channels koom nrog hauv kev thauj mus los ntawm ions. Cov neeg thauj khoom tau koom nrog hauv kev thauj mus los ntawm ions los ntawm kev siv lub zog ntawm ATP. Yog li, qhov no tuaj yeem piav qhia qhov txawv ntawm Ion Channel thiab Transporter.
Download PDF Version ntawm Ion Channel vs Transporter
Koj tuaj yeem rub tawm PDF version ntawm kab lus no thiab siv nws rau offline lub hom phiaj raws li daim ntawv ceeb toom. Thov download PDF version ntawm no Qhov txawv Ntawm Ion Channel thiab Transporter
