Dab tsi yog kev thauj cov khoom uas tsis xav tau lub zog?
Dab tsi yog kev thauj cov khoom uas tsis xav tau lub zog?

Video: Dab tsi yog kev thauj cov khoom uas tsis xav tau lub zog?

Video: Dab tsi yog kev thauj cov khoom uas tsis xav tau lub zog?
Video: zoo nyob tag npaum no xoom ceev2 kom phev los tso mam saib seb yog leej twg 2024, Kaum ib hlis
Anonim

Cov qauv yooj yim tshaj plaws ntawm kev thauj mus los ntawm ib daim nyias nyias yog passive . Passive thauj tsis xav kom lub xovtooj los siv lub zog thiab koom nrog cov tshuaj diffusing cia nws cov concentration gradient hla ib daim nyias nyias.

Yog li ntawd, hom hluav taws xob twg xav tau rau kev thauj mus los passive?

Passive thauj yog ib qho kev txav ntawm ions thiab lwm yam atomic los yog molecular tshuaj nyob rau hauv cell membranes yam tsis xav tau zog nkag. Tsis zoo li kev thauj mus los , nws tsis tas yuav muaj cov tswv yim ntawm cellular zog vim hais tias nws yog es tsis txhob tsav los ntawm qhov nyiam ntawm qhov system kom loj hlob hauv entropy.

Tsis tas li ntawd, vim li cas diffusion tsis xav tau lub zog? Nws tshwm sim nyob rau hauv ib tug concentration gradient - molecules txav los ntawm ib thaj tsam ntawm siab mus rau qis concentration. Qhov no tsis xav tau ib qho khoom siv zog vim diffusion yog tus txheej txheem spontaneous.

Hais txog qhov no, dab tsi 3 molecules tsis tau yooj yim dhau los ntawm daim nyias nyias?

Lub plasma daim nyias nyias yog selectively permeable; hydrophobic molecules thiab me polar molecules tau diffuse dhau cov lipid txheej, tab sis ions thiab loj polar molecules ua tsis tau . Kev tsis sib xws daim nyias nyias proteins pab ions thiab polar loj molecules rau dhau los ntawm daim nyias nyias los ntawm passive lossis active thauj.

Yuav ua li cas molecules thauj uas tsis yooj yim hla lub membrane?

Osmosis yog qhov txav ntawm cov kuab tshuaj molecules los ntawm ib nrab permeable daim nyias nyias nyob rau hauv ib cheeb tsam ntawm ntau dua solute concentration, nyob rau hauv thiaj li yuav sib npaug zos solute concentrations ntawm ob sab. Hypotonic. Tsawg solute, dej ntau.

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