Qhov sib txawv tseem ceeb ntawm cov dej ntws tawm thiab qhov sib txawv yog tias cov dej ntws tawm ntau yog qhov txav ntawm cov kua los yog qhov loj vim qhov siab gradient thaum diffusion yog qhov txav ntawm cov molecules los ntawm thaj chaw siab dua mus rau thaj tsam qis dua. raws qhov concentration gradient.
Ntau ntws thiab diffusion yog ob txoj hauv kev uas cov molecules txav ntawm ib qho chaw mus rau lwm qhov. Bulk flow yog hais txog kev txav ntawm cov kua uas tau tsav los ntawm lub siab gradient. Diffusion yog qhov txav ntawm cov molecules hauv qhov concentration gradient. Ob qho txheej txheem tshwm sim thaum tib neeg ua pa. Diffusion thiab bulk flow kuj yog txoj hauv kev sib pauv cov ntaub ntawv ntawm cov ntshav thiab cov kua dej nruab nrab. Ntxiv mus, ob txoj kev tseem ceeb heev hauv cov khoom muaj sia, tshwj xeeb tshaj yog nyob rau hauv cov nroj tsuag.
Ntau Flow yog dab tsi?
Ntau ntws yog qhov txav ntawm cov kua dej hauv qhov siab gradient. Cov dej ntws ntau yog txheej txheem tseem ceeb hauv cov nroj tsuag. Cov dej thiab cov kuab tshuaj txav mus raws cov tracheid thiab cov hlab ntsha ntawm xylem thiab sieve tube ntawm phloem vim yog cov dej ntws ntau. Yog li ntawd, kev thauj mus los ntev ntawm cov kua hauv cov nroj tsuag yuav siv qhov chaw nrog kev pab ntawm cov khoom ntws.
Daim duab 01: Bulk Flow
Cov dej ntws ntau yog qhov sib piv rau cov dej ntws los ntawm cov yeeb nkab lossis cov ntshav ntws los ntawm cov hlab ntsha. Tsis zoo li diffusion, bulk flow txav tag nrho cov tshuaj, tsis yog dej los yog solutes. Yog li ntawd, cov khoom txav mus rau hauv ib pawg thaum lub sij hawm bulk flow. Ntxiv mus, bulk flow yog ceev tshaj diffusion.
Diffusion yog dab tsi?
Diffusion yog qhov txav ntawm cov molecules los ntawm thaj tsam ntawm cov concentration siab dua mus rau thaj tsam qis dua. Nws tshwm sim raws qhov concentration gradient. Yog li ntawd, nws yog ib tug passive txheej txheem uas tshwm sim tsis siv lub zog. Nws tshwm sim ntawm nws tus kheej. Nws tsis tas yuav nplawm, co lossis wafting. Cov kua thiab gasses txav ntawm diffusion. Muaj ob hom diffusion. Lawv yog cov yooj yim diffusion thiab yooj yim diffusion. Yooj yim diffusion yuav siv qhov chaw yam tsis muaj kev pab los ntawm cov proteins thauj, thaum uas yooj yim diffusion tshwm sim nrog kev pab los ntawm cov cab kuj molecules. Muaj ob peb yam cuam tshuam rau diffusion. Lawv yog qhov kub thiab txias, qhov luaj li cas ntawm cov particle, steepness ntawm cov concentration gradient thiab cheeb tsam ntawm kev sib cuam tshuam.
Daim duab 02: Diffusion
Thaum koj qhib lub raj mis naj hoom, cov tshuaj tsw qab permeates tseem cua vim muaj kev sib txawv. Thaum koj taug kev mus rau lub khw kas fes, koj hnov cov kas fes. Qhov no kuj yog vim diffusion. Tsis tas li ntawd, thaum koj muab tus cwj mem poob rau hauv lub khob dej, cov xim kis tau los ntawm lub khob dej vim muaj qhov sib txawv. Ntawm no, cov khoom txav mus los ntawm qhov chaw mus rau qhov chaw. Hauv cov hlwb uas muaj sia nyob, kev nthuav tawm yog ib qho tseem ceeb ntawm cov txheej txheem. Cov khoom nkag mus rau hauv thiab tawm ntawm cov cell ntawm diffusion. Gas pauv nyob rau hauv lub alveoli kuj tshwm sim ntawm diffusion.
Dab tsi yog qhov zoo sib xws ntawm Bulk Flow thiab Diffusion?
- Ntau qhov ntws thiab sib kis yog ob ntawm peb lub tshuab uas pab txhawb kev sib pauv capillary.
- Ob qho tib si ntau thiab nthuav tawm tshwm sim hauv tib neeg ua pa.
- Cov txheej txheem no xaus thaum tsis muaj gradient.
- Lawv yog txoj kev thauj mus los.
Dab tsi yog qhov txawv ntawm Bulk Flow thiab Diffusion?
Cov dej ntau tshwm sim vim muaj qhov siab gradient, thaum diffusion tshwm sim vim qhov concentration gradient. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm bulk flow thiab diffusion. Ntxiv mus, bulk flow txav tag nrho cov tshuaj thaum nyob rau hauv diffusion, solutes txav los ntawm siab dua concentration mus rau qis concentration. Ntxiv mus, bulk flow yog txheej txheem sai dua li diffusion.
Hauv qab infographic qhia txog kev nthuav dav ntxiv los ntawm kev sib piv ntawm ob lub tswv yim kom pom qhov sib txawv ntawm qhov sib txawv ntawm cov dej ntws thiab kev nthuav dav yooj yim.
Summary – Bulk Flow vs Diffusion
Ntau ntws yog qhov txav ntawm cov khoom nyob rau hauv ib qho lossis hauv cov huab cua hauv qhov siab gradient. Ntawm qhov tod tes, diffusion yog qhov txav ntawm cov molecules los ntawm thaj tsam ntawm cov concentration siab dua mus rau thaj tsam ntawm qis qis raws li qhov concentration gradient. Ob txheej txheem yog cov txheej txheem passive. Txawm li cas los xij, bulk flow yog txheej txheem nrawm dua, thiab nws txav tag nrho cov tshuaj. Diffusion yog txheej txheem qeeb, thiab nws txav tsuas yog solutes. Cov dej ntws ntau tshwm sim los ntawm qhov siab gradient thaum diffusion tshwm sim los ntawm qhov concentration gradient. Yog li, qhov no yog cov ntsiab lus ntawm qhov sib txawv ntawm bulk flow thiab diffusion.
