Qhov sib txawv tseem ceeb ntawm ion channel thiab ion twj tso kua mis yog tias ions txav mus los ntawm cov ion channel thaum ions txav mus los ntawm cov twj ion.
Ions taug kev hla cov ntshav plasma los ntawm ion raws lossis ion twj. Ion channels yog transmembrane proteins uas passively thauj ions cia lawv electrochemical gradient hla lub cell membranes. Ion twj tso kua mis yog transmembrane proteins uas nquag thauj ions tiv thaiv ib qho concentration lossis electrochemical gradient hla cov ntshav plasma. Ob leeg ion channel thiab ion twj tso kua mis muaj nyob rau hauv lub cell membrane. Lawv xaiv rau cov ions tshwj xeeb.
Ion Channel yog dab tsi?
Ion channel yog cov protein tshwj xeeb nyob hauv cov cell membrane. Ion channels passively thauj ions hla lub cell membrane raws qhov concentration gradient. Raws li txoj cai, ion channels yog heteromultimeric complexes ntawm ib mus rau plaub qhov pore-forming α subunits teem ib ncig ntawm lub hauv paus membrane-spanning ncej. Feem ntau, ion channels muaj cov lim dej xaiv uas tso cai rau tib hom ion mus hla. Yog li, feem ntau ion channel yog xaiv rau cov ions tshwj xeeb. Txawm li cas los xij, qee qhov ion channels xws li ligand-gated ion channel tso cai rau kev hla ntawm ntau hom ion.
Daim duab 01: Ion Channel
Ion channels tuaj yeem ua tsis tau los yog gated. Voltage-gated ion channels thiab ligand-gated ion channels yog ob hom gated ion channels. Qhov tseeb, feem ntau ntawm ion channel poob rau hauv ob pawg dav: voltage-gated lossis ligand-gated. Na+, K+, Ca2+ thiab Cl- ions feem ntau txav mus los ntawm ion raws. Ion channels cuam tshuam lub peev xwm ntawm daim nyias nyias vim lawv tsim cov ionic tam sim no los ntawm kev txav ntawm cov ions them los ntawm cov membrane channels.
Ion Pump yog dab tsi?
Ion twj tso kua mis yog lub transmembrane protein uas nquag thauj ions hla lub cell membrane. Ion twj siv lub zog los ntawm ATP txhawm rau tsim cov gradients. Tom qab ntawd cov ions txav tawm tsam qhov concentration gradient los ntawm cov twj ion. Zoo ib yam li ion channel, ion twj tso kua mis kuj xaiv rau ions. Na+/K+ twj, H+ twj, Ca2 + pumps thiab Cl -pumps yog ob peb lub twj tso kua mis tshwj xeeb.
Daim duab 02: Ion Pump
Ion twj tso kua mis kuj tuaj yeem muab faib ua thawj lossis theem nrab cov khoom siv thauj khoom raws li txoj kev uas lawv siv los txav ions. Cov neeg ua haujlwm tseem ceeb thauj mus rau hydrolyze ATP los tsim lub zog txhawm rau txhawm rau thauj ions hla daim nyias nyias. Secondary active transporters siv electrochemical gradient tsim thoob plaws hauv daim nyias nyias los ntawm kev siv cov ions hauv lossis tawm ntawm lub cell. Secondary active transporters tuaj yeem yog cov neeg tawm tsam lossis cov neeg sib tw. Antiporters tso ob lub ions sib txawv los yog cov kuab tshuaj nyob rau hauv cov lus qhia sib txawv ntawm daim nyias nyias. Symporters tso ob lub ions sib txawv los yog cov kuab tshuaj nyob rau hauv tib txoj kev.
Dab tsi zoo sib xws ntawm Ion Channel thiab Ion Pump?
- Ion channel thiab ion twj tso kua mis yog ob hom transmembrane proteins uas pab txhawb kev txav ntawm ions hla lub membrane.
- Lawv pab tswj kev tsis tu ncua ntawm ions hla lub membrane.
Qhov txawv ntawm Ion Channel thiab Ion Pump yog dab tsi?
Ion channels tso cai rau ions kom dhau mus ua kom muaj kev sib haum xeeb thoob plaws hauv daim nyias nyias thaum ion twj tso kua mis nquag thauj ions tawm tsam qhov concentration gradient thoob plaws hauv daim nyias nyias. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm ion channel thiab ion twj tso kua mis. Ntxiv mus, ion channel tuaj yeem raug gated lossis tsis-gated thaum lub twj tso kua mis ion muaj tsawg kawg yog ob lub rooj vag.
Cov hauv qab no infographic teev ntau qhov sib txawv ntawm ion channel thiab ion twj tso kua mis hauv tabular rau ib sab ntawm kev sib piv.
Summary – Ion Channel vs Ion Pump
Ion channel thiab ion twj tso kua mis yog ob hom proteins uas thauj ions hla lub cell membrane. Ion channels thauj ions passively yam tsis muaj kev siv lub zog thaum lub twj tso kua mis ion thauj ions nquag nrog kev siv lub zog. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm ion channel thiab ion twj tso kua mis. Ntxiv mus, ion channel xav tau ib lub rooj vag nkaus xwb thaum lub twj tso kua mis ion xav tau tsawg kawg yog ob lub rooj vag.
