Tonicity thiab osmosis yog dab tsi?
Tonicity thiab osmosis yog dab tsi?

Video: Tonicity thiab osmosis yog dab tsi?

Video: Tonicity thiab osmosis yog dab tsi?
Video: Osmosis and Tonicity 2024, Kaum ib hlis
Anonim

Lub peev xwm ntawm cov tshuaj extracellular ua kom cov dej txav mus rau hauv lossis tawm ntawm lub cell los ntawm osmosis paub li nws tonicity . Kev daws nrog osmolarity tsawg muaj tsawg dua cov ntsiab lus ntawm ib liter ntawm kev daws, thaum cov tshuaj uas muaj osmolarity siab muaj ntau dua cov ntsiab lus ib liter ntawm kev daws.

Hauv qhov no, tonicity cuam tshuam li cas osmosis?

“ Tonicity yog lub peev xwm ntawm kev daws teeb meem cuam tshuam cov dej ntim thiab siab nyob rau hauv ib lub cell. Yog tias cov kua dej tsis tuaj yeem dhau los ntawm cov plasma membrane, tab sis tseem muaj ntau dua ntawm ib sab ntawm daim nyias nyias dua li ntawm lwm qhov, nws ua rau osmosis .”

Ib sab saum toj no, osmosis hypertonic yog dab tsi? Thaum xav txog osmosis , peb ib txwm muab piv cov kuab tshuaj concentration ntawm ob txoj kev daws teeb meem, thiab qee cov qauv terminology feem ntau yog siv los piav txog qhov sib txawv no: Isotonic: Cov kev daws teeb meem tau muab piv nrog cov ntsiab lus sib npaug. Hypertonic : Cov tshuaj nrog cov concentration ntau dua ntawm cov kuab tshuaj.

Kuj paub yog, dab tsi yog tonicity hauv biology?

Tonicity yog ib qho kev ntsuas ntawm qhov ua tau zoo osmotic siab gradient; cov dej muaj peev xwm ntawm ob txoj kev daws teeb meem sib cais los ntawm ib qho semipermeable cell membrane. Hauv lwm lo lus, tonicity yog tus txheeb ze concentration ntawm solutes yaj nyob rau hauv kev daws uas txiav txim siab qhov kev taw qhia thiab qhov twg ntawm diffusion.

Dab tsi yog qhov yooj yim txhais ntawm osmosis?

Osmosis yog kev txav ntawm cov dej lossis lwm yam kuab tshuaj los ntawm cov ntshav ntshav los ntawm thaj av uas muaj cov kuab tshuaj tsawg mus rau thaj av uas muaj cov kuab tshuaj siab ntau, ua kom sib npaug qhov sib xyaw ntawm cov kuab tshuaj. Osmosis yog passive thauj, lub ntsiab lus nws tsis xav tau lub zog los thov.

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