Yooj yim diffusion yog li tso cai polar thiab them cov molecules, xws li carbohydrates, amino acids, nucleosides, thiab ions, hla cov ntshav plasma. Ob chav kawm ntawm cov proteins uas kho kom yooj yim diffusion yog feem ntau txawv: cov khoom noj proteins thiab cov proteins channel.
Puas ions xav tau kev yooj yim diffusion?
Ions, txawm hais tias me me molecules, tsis tuaj yeem nthuav tawm los ntawm lipid bilayer ntawm cov kab mob lom vim yog cov nqi lawv nqa. Yog li, lawv tau thauj hauv lawv qhov kev sib tw gradient los ntawm kev yooj yim diffusion. Potassium ions, sodium ions, thiab calcium ions xav tau cov txheej txheem membrane uas tuaj yeem muab txoj hauv kev.
Puas pab kom muaj kev sib txawv siv cov twj ion?
Pump action yog ib qho piv txwv ntawm kev thauj mus los. Raws li qhov sib txawv, ua kom cov ions ntws sai heev los ntawm daim nyias nyias nyob rau hauv ib qho kev taw qhia downhill. Channel ua piv txwv passive transport , los yog pab kom muaj kev sib kis. … Lub twj tso kua mis no ua lub luag haujlwm tseem ceeb hauv extruding Ca2+ los ntawm cov hlwb.
hom kev thauj twg siv ions?
Kev thauj mus los tseem ceeb txav ions hla ib daim nyias nyias thiab tsim qhov sib txawv ntawm tus nqi hla ntawm daim nyias nyias. Lub hauv paus nquag thauj khoom siv ATP txav cov khoom, xws li ion, mus rau hauv lub cell, thiab feem ntau nyob rau tib lub sijhawm, cov khoom thib ob raug tshem tawm ntawm lub cell.
YDab tsi yog qhov sib txawv ntawm ions?
Ionicdiffusion yog hais txog qhov diffusion ntawm cov tsiaj them uas cuam tshuam electrostatically, thaum molecular diffusion feem ntau yog siv los piav qhia txog kev tsiv teb tsaws ntawm hom nruab nrab.
