2024 Tus sau: Elizabeth Oswald | [email protected]. Kawg hloov kho: 2024-01-13 00:07
Cov ntu uas tsis tau siv ua rau lub hauv ntej thiab tom qab neuropores. Kaw cov no yuav ua kom tiav neural tube tsim. Lub anterior neuropore feem ntau kaw los ntawm hnub 26 thiab posterior neuropore kaw thaum kawg ntawm lub lim tiam thib 4, hnub 28.
Hnub twg lub cranial neuropore kaw?
Nyob rau hauv tib neeg embryos, lub cranial neuropore kaw kwv yees li ntawm hnub 24 thiab caudal neuropore hnub 28. Ua tsis tiav ntawm cranial (superior) thiab caudal (inferior) neuropore kaw tau tshwm sim. nyob rau hauv tej yam kev mob hu ua anencephaly thiab spina bifida, feem.
Thaum kaw cranial neuropore caudal?
Lub caudal neuropore kaw thaum lub sij hawm stage 12, feem ntau thaum 25 somititc khub tam sim no. Qhov chaw ntawm qhov kawg kaw yog nyob rau theem ntawm yav tom ntej somite 31, uas sib haum mus rau qib thib ob sacral vertebral.
Yuav ua li cas yog tias lub paj hlwb cranial tsis kaw?
Yog tias qhov posterior neuropore tsis kaw, a spina bifida tshwm sim. Yog hais tias, ntawm qhov tod tes, qhov kaw ntawm lub anterior neuropore tsis ua tiav, qhov tshwm sim anencephaly. Thaum lub neural raj nyob rau hauv tus txheej txheem ntawm kaw, cov hlwb nyob rau sab sab ntawm lub neural phaj detach lawv tus kheej thiab tsim lub neural crest.
Lub lis piam twg Neurulation tiav?
Primary versus secondary neurulation
Primary neurulation hais txog kev loj hlob ntawm neural raj nyob rau hauv lub zog ntawm lub notochordthiab mesoderm. Nws xaus rau 4 lub lim tiam ntawm embryonickev loj hlob nrog kev kaw ntawm lub posterior neuropore.
Pom zoo:
Puas cog qhov kaw kaw?
Thaum shutters tsis yog tag nrho thaiv, lawv yog ib qho kev xaiv zoo dua rau kev txwv lub teeb hauv koj chav. … Cog shutters cia ib co teeb pom kev ntawm louvers, thiab nruab nrab ntawm lub vaj huam sib luag thiab ncej. Puas cog cov ntoo kaw ua qhov tsaus?
Vim li cas thiaj kaw cov neuropore tseem ceeb?
Nyob rau hauv tib neeg embryos, lub cranial neuropore kaw kwv yees li ntawm hnub 24 thiab caudal neuropore rau hnub 28. Kev ua tsis tiav ntawm lub cranial (superior) thiab caudal (inferior) neuropore kaw ua rau muaj mob hu ua anencephaly thiab spina bifida, feem.
Hnub twg lub cranial neuropore kaw?
Cov ntu uas tsis tau siv ua rau lub hauv ntej thiab tom qab neuropores. Kaw cov no yuav ua kom tiav neural tube tsim. Lub anterior neuropore feem ntau kaw los ntawm hnub 26 thiab lub posterior neuropore kaw thaum kawg ntawm lub lim tiam thib 4, hnub 28.
Los ntawm leej twg thiab thaum twg thawj lub rooj sib tham raug kaw?
Hint First Jain Council tau tuav hauv 3rd Century BC, nyob rau hauv tus thawj tswj hwm ntawm Sthulabhadra. Nws tau tuav hauv lub nroog uas tam sim no hu ua Patna, lub peev ntawm Bihar. Leej twg tau sib ntsib thawj Jain Council? Thawj Jain Council Hloov ntawm Patliputra hauv 3 rd Century B.
Thaum twg siv kaw lossis kaw?
Trick kom nco ntsoov qhov txawv Hnub no, koj yuav tsum siv ib txwm kaw. Inclosed tsis tau suav hais tias yog tus qauv sib txawv, thiab ntau tus neeg nyeem yuav pom tias nws yog qhov tsis raug. Tib yam muaj tseeb rau lwm lo lus hais txog kev kaw:
