Video: Pom Iodopsin nyob qhov twg?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Cov iodopsin tshuaj lawv pom hauv lub khob ntawm cov nqaij qaib retina zoo ib yam nrog rhodopsin system hauv nws cov carotenoids. Nws txawv tsuas yog hauv cov protein -opsin -nrog uas carotenoid sib xyaw. Lub khob hliav qab protein tuaj yeem hu ua photopsin kom paub qhov txawv nws los ntawm scotopsins ntawm cov pas nrig.
Yog li ntawd, Iodopsin yog cov protein?
Iodopsin muaj cov protein ntau tiv thaiv kab mob thiab kab mob sib kis, retinal. Photopsins (tseem hu ua Cone opsins) yog tus neeg txais duab cov protein pom hauv lub khob hliav qab ntawm cov retina uas yog lub hauv paus ntawm kev pom xim.
Qhov Phototransduction tshwm sim nyob qhov twg? Kev yees duab yog txheej txheem los ntawm cov photons, cov hauv paus ntsiab lus ntawm lub teeb, hloov pauv mus rau hluav taws xob teeb liab. Pom phototransduction tshwm sim hauv cov retina los ntawm photoreceptors, hlwb uas nkag siab rau lub teeb.
Tib neeg tseem nug, Iodopsin tawg mus rau dab tsi?
Thaum raug rau lub teeb, cov xim tam sim photobleaches tawg rau hauv opsin thiab retinal. Cov tawg ntawm rhodopsin ua rau tus neeg xa xov thib ob cascade (phototransduction) thaum kawg ua rau cov ntaub ntawv ncav cuag lub qhov muag pom.
Cov cones nyob qhov twg?
Cov phooj ywg thiab Lub khob hliav qab yog cov hlwb photoreceptive ntawm cov retina, nyob tom qab qhov muag . Cov Lub khob hliav qab cov cell yog lub luag haujlwm rau lub zeem muag xim, thiab feem ntau ntom nyob hauv nruab nrab ntawm cov retina, thaj chaw hu ua fovea.
Pom zoo:
Qhov chaw nyob ntawm thawj lub tsev kawm qib siab kho hniav nyob hauv ntiaj teb nyob qhov twg?
Dr. John M. Harris tau pib lub ntiaj teb thawj lub tsev kho hniav hauv Bainbridge, Ohio, thiab tau pab tsim kho hniav raws li kev noj qab haus huv. Nws qhib rau 21 Lub Ob Hlis 1828, thiab niaj hnub no yog tsev khaws puav pheej kho hniav. Thawj lub tsev kawm kho hniav, Baltimore College ntawm Kev Kho Hniav, tau qhib hauv Baltimore, Maryland, Asmeskas xyoo 1840
Thawj qhov muag pom qhov muag nyob qhov twg?
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