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Video: Spemann thiab Mangold pom dab tsi los ua tus npaj?
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2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Cov Spemann - Mangold organizer , kuj hu ua Spemann organizer , yog ib pawg ntawm cov hlwb nyob rau hauv kev tsim embryo ntawm amphibian uas induces kev loj hlob ntawm lub hauv paus paj hlwb. Spemann kuj tsim cov microtools xav tau rau kev sim ua ntej embryology, uas yog iav koob thiab micropipettes.
Tom qab ntawd, Hans Spemann nrhiav tau dab tsi?
Hans Spemann: koj puas xav tau ntau tus thwjtim? (27 Lub Xya hli ntuj 1869 - 9 Cuaj hlis 1941) yog ib tug German embryologist uas tau txais ib tug Nobel nqi zog nyob rau hauv Physiology los yog tshuaj nyob rau hauv 1935 rau nws nrhiav pom ntawm cov txiaj ntsig tam sim no hu ua embryonic induction, muaj kev cuam tshuam, ua haujlwm los ntawm ntau qhov chaw ntawm lub embryo, uas coj kev txhim kho ntawm pab pawg ntawm cov cell mus rau hauv
Kuj Paub, dab tsi yog lub koom haum hauv kev txhim kho biology? Ib " tus tuav "tau hais tseg raws li thaj av, lossis pab pawg ntawm cov cell hauv ib lub embryo uas tuaj yeem tsim ob qho tib si (hloov txoj hmoo) thiab cov qauv (tsim cov txheej txheem teeb tsa) uas nyob ib sab ntawm lub cev embryonic.
Qhov thib ob, lub koom haum Spemann tau tsim li cas?
Abstract Tus tus neeg saib xyuas yog tsim nyob rau hauv ib qho equatorial sector ntawm blastula theem amphibian embryo los ntawm cov hlwb uas tau teb rau ob tus neeg sawv cev ntawm leej niam: ib qho meso-endoderm inducer (nrog rau TFG-β signaling pathway) thiab dorsal modifier (tej zaum cuam tshuam nrog Wnt signaling pathway).
Dab tsi yog tus txheej txheem tshwm sim?
Kev txhais lus ntawm tus neeg saib xyuas 1: ib organised. 2: ib cheeb tsam ntawm kev txhim kho embryo (raws li lub chordamesoderm ntawm lub qhov ncauj ntawm lub qhov ncauj ntawm lub vertebrate blastopore) lossis cov khoom tsim los ntawm cov cheeb tsam uas muaj peev xwm txhawb nqa ib qho tshwj xeeb ntawm kev txhim kho hauv cov nqaij mos tsis txawv. - tseem hu ua inductor.
Pom zoo:
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Kev pom tus kheej yog tus neeg txhua tus ntawm peb ntseeg peb yog thaum peb tshuaj xyuas peb tus kheej. Kev nthuav tawm tus kheej yog duab pej xeem peb nthuav tawm, uas ib txwm yog kev pom zoo hauv zej zog
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Qhov muag tsis pom, lossis ob-qhov muag tsis pom, yog thaum tus neeg mob tsis paub tias lawv tau txais kev kho mob li cas. Lawv tuaj yeem tau txais cov placebo lossis cov tshuaj tiag. Qhov muag tsis pom kuj tseem hais txog kev coj ua ntawm kev khaws lub npe ntawm kev kho mob. Placebos tuaj yeem siv rau qhov muag tsis pom hauv kev txheeb cais
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Xya lub hlwb, sawv cev rau txhua hom, tau koom ua ke los ua ommatidia
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Thaum tus me nyuam muaj strabismus, lub qhov muag tsis tsom mus rau tib yam khoom thiab txhua lub qhov muag xa cov duab sib txawv rau lub hlwb. Raws li qhov tshwm sim, lub hlwb yuav pom ob daim duab (ob lub zeem muag) lossis cov khoom zoo li qhov muag tsis pom. Cov menyuam yaus lub hlwb yog qhov ntse tiag tiag, thiab lawv tsis nyiam tau txais ob daim duab sib txawv es tsis yog ib qho
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Qhov kev npaj ua ntej yog kev ntseeg tias tib neeg muaj lub siab nyiam, raws li kev xaiv ntuj tsim, kom ntshai tej yam uas yog qhov txaus ntshai rau peb cov poj koob yawm txwv. Qhov kev nyiam no tseem ua rau peb hnov mob ua ntej muab kev xav ntau rau nws