Qhov sib txawv tseem ceeb ntawm kev nquag nquag thiab tsis muaj zog yog qhov nquag nquag nquag los yog kev thauj mus los siv lub zog los thauj cov molecules tawm tsam cov concentration gradient thaum lub passive diffusion tsis xav tau lub zog vim nws tshwm sim raws qhov concentration gradient.
Muaj ntau hom kev thauj mus los uas pab txav cov khoom ntawm ib qhov mus rau lwm qhov. Yeej, muaj ob txoj kev thauj mus los; lawv yog cov active thiab passive thauj los yog diffusion. Lub hauv paus tseem ceeb rau qhov sib txawv ntawm kev nquag thiab tsis muaj zog yog kev siv hluav taws xob. Kev thauj khoom nquag siv lub zog thaum kev thauj mus los tsis tas yuav muaj lub zog tshwm sim. Tsis tas li ntawd, muaj qee qhov sib txawv ntawm cov nquag thiab passive diffusion. Lub hom phiaj tseem ceeb ntawm tsab xov xwm no yog los tham txog qhov sib txawv thaum muab kev nkag siab ntawm ob lub tswv yim.
Dab tsi yog Active Diffusion?
Kev thauj mus los (nquag diffusion) yog ib hom kev nthuav dav uas siv lub zog thauj cov molecules hla ib daim nyias nyias los ntawm qhov qis dua mus rau qhov siab dua tiv thaiv cov concentration gradient. Nws txawv ntawm passive diffusion vim nws tshwm sim tawm tsam cov concentration gradient thiab xav tau lub zog. Lub net txav ntawm molecules tshwm sim los ntawm thaj tsam qis concentration mus rau thaj tsam siab concentration. Active diffusion yog lub luag hauj lwm rau tsub zuj zuj ntawm cov as-ham tseem ceeb xws li ions, qabzib, amino acids, thiab lwm yam, nyob rau hauv lub hlwb.
Daim duab 01: Kev Thauj Mus Los
Tsis tas li ntawd, kev thauj khoom nquag tuaj yeem yog thawj thauj khoom thauj lossis thauj khoom thib ob. Lub hauv paus nquag thauj khoom siv lub zog ntawm ATP thaum lub sijhawm thauj khoom thib ob siv cov electrochemical gradient. Raws li, kev thauj khoom nquag tshwm sim hauv tib neeg, tsiaj txhu thiab cov nroj tsuag hlwb. Kev thauj mus los ntawm cov ntxhia ions los ntawm cov av daws mus rau cov hauv paus plaub hau hlwb thiab cov plab hnyuv siab rau cov suab thaj tshwm sim vim qhov kev ua kom nquag plias.
Passive Diffusion yog dab tsi?
Diffusion yog ib txoj hauv kev uas pom muaj nyob hauv kev thauj mus los tsis zoo. Nws yog cov txheej txheem uas pab txhawb kev txav ntawm cov molecules los ntawm cheeb tsam siab dua mus rau thaj tsam qis dua raws li qhov concentration gradient. Yog li ntawd, passive diffusion yog ib qho kev txav ntawm cov molecules los ntawm thaj chaw siab dua mus rau thaj tsam qis dua nyob thoob plaws hauv daim nyias nyias raws qhov concentration gradient. Nyob rau hauv no, lub net txav ntawm molecules tshwm sim los ntawm ib tug siab concentration mus rau ib tug tsawg concentration vim lub kinetic zog. Li no, nws tsis xav tau lub zog ntawm tes.
Passive diffusion muaj ntau hom xws li yooj yim diffusion, yooj yim diffusion, osmosis, thiab lwm yam, raws li txoj kev thauj mus los. Nyob rau hauv yooj yim diffusion, solutes taug kev los ntawm high concentration mus rau tsawg concentration down ib tug concentration gradient yam tsis muaj kev koom tes ntawm ib daim nyias nyias. Nyob rau hauv yooj yim diffusion, tshwj xeeb membrane proteins hu ua cab kuj los yog channel proteins koom nyob rau hauv cov txheej txheem. Txij li thaum cov cab kuj los yog cov channel proteins pab cov txheej txheem, nws tau txais lub npe 'fais fab diffusion'.
Daim duab 02: Passive Diffusion
Qee cov molecules loj tsis tuaj yeem dhau los ntawm daim nyias nyias. Yog li ntawd, lawv xav tau kev txhawb nqa tshwj xeeb rau kev thauj mus los. Qhov ntawd yog; kev thauj cov proteins nyob rau hauv lub cell membrane raug hloov los ua qhov haujlwm no. Nyob rau hauv no, rau lub hom phiaj ntawm kev txav mus los, cov molecule tshwj xeeb khi nrog cov protein ua haujlwm. Txawm li cas los xij, nws tseem tshwm sim los ntawm qhov concentration gradient.
Thaum kawg, osmosis yog ib hom kev sib txawv uas cov dej molecules txav mus thoob lub semi-permeable lossis selectively permeable membrane los ntawm cov dej muaj peev xwm mus rau cov dej tsawg. Ib yam li ntawd, kev pom kuj yog ib hom kev thauj mus los tsis zoo tab sis tsis suav tias yog qhov sib txawv.
Dab tsi zoo sib xws ntawm Active thiab Passive Diffusion?
- Active thiab Passive Diffusion yog ob hom txheej txheem uas koom nrog kev txav ntawm cov molecules ntawm ib qho chaw mus rau lwm qhov chaw.
- Ob yam txheej txheem tshwm sim hauv hlwb.
- Tsis tas li, ob qho tib si yog cov txheej txheem tseem ceeb heev rau cov kab mob muaj sia.
Qhov txawv ntawm Active thiab Passive Diffusion yog dab tsi?
Acive diffusion siv lub zog thaum passive diffusion tsis. Yog li, nws yog qhov sib txawv tseem ceeb ntawm kev nquag nquag thiab tsis muaj zog. Tsis tas li ntawd, qhov sib txawv tseem ceeb ntawm kev nquag thiab tsis muaj zog yog qhov ua kom nquag plias tshwm sim los ntawm qhov tsis tshua muaj siab mus rau siab concentration tiv thaiv cov concentration gradient thaum lub passive diffusion tshwm sim los ntawm siab concentration mus rau qis concentration raws li concentration gradient.
Ntxiv mus, qhov kev txav ntawm cov molecules tseem ua rau muaj qhov sib txawv ntawm qhov nquag thiab tsis muaj zog. Net txav ntawm molecules yog los ntawm qis concentration mus rau siab concentration nyob rau hauv active thauj thaum nws yog los ntawm siab concentration mus rau tsawg concentration nyob rau hauv passive diffusion.
Dhau li ntawd, muaj ob lub ntsiab ntawm kev thauj mus los; thawj thiab theem nrab active thauj thaum muaj plaub hom passive diffusion; yooj yim diffusion, yooj yim diffusion, osmosis thiab pom.
Cov hauv qab no infographic ntawm qhov sib txawv ntawm kev nquag thiab tsis muaj zog nthuav qhia cov kev sib txawv no raws li kev sib piv ntawm ib sab.
Summary – Active vs Passive Diffusion
Active thiab passive diffusion yog ob txoj hauv kev uas pab txhawb kev txav ntawm cov molecules. Nyob rau hauv cov ntsiab lus ntawm qhov sib txawv ntawm active thiab passive diffusion, qhov tseem ceeb sib txawv ntawm active thiab passive diffusion yog lub zog yuav tsum tau. Kev thauj mus los yuav tsum muaj zog. Tab sis, passive diffusion tsis xav tau lub zog.
Tsis tas li ntawd, kev thauj khoom nquag tshwm sim tawm tsam qhov concentration gradient thaum passive diffusion tshwm sim raws qhov concentration gradient. Tsis tas li ntawd, lub net txav ntawm molecules nyob rau hauv active thauj yuav siv sij hawm qhov chaw los ntawm tsawg concentration mus rau siab concentration thaum lub net txav ntawm molecules nyob rau hauv passive diffusion yuav siv qhov chaw los ntawm high concentration mus rau tsawg concentration.
