Video: Dab tsi yog cov xwm txheej tseem ceeb ntawm fertilization?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Cov theem ntawm fertilization tuaj yeem faib ua cov txheej txheem: 1) kev npaj phev, 2) phev-qe paub thiab khi, 3) phev-qe fusion thiab 4) fusion ntawm phev thiab eggpronuclei thiab ua kom zygote.
Tsis tas li, cov xwm txheej ntawm fertilization yog dab tsi?
Plaub tseem ceeb txheej xwm ntawm fertilization hauv seaurchin yog: 1) cov tshuaj tiv thaiv acrosome ntawm cov phev, 2) phev-qe sib xyaw, 3) cortical cov tshuaj tiv thaiv ntawm lub qe, thiab 4) tsim ntawm fertilization tsho loj.
Tsis tas li ntawd, hom kev fertilization yog dab tsi? Hauv tsiaj, muaj ob hom fertilization , sab hauv thiab sab nrauv. Sab hauv fertilization tshwm sim hauv tus poj niam lub cev. Sab nrauv fertilization tshwm sim sab nraum tus neeg. Cov tsiaj txhu, noog, thiab cov tsiaj reptiles siv sab hauv fertilization.
Hauv txoj kev no, lub sijhawm ua tiav kev ua tiav fertilization yog dab tsi?
Tom qab lub qe tso tawm, nws txav mus rau hauv lub fallopiantube. Nws nyob ntawd rau li 24 teev, tos ib zaug xwb phev rau fertilize nws. Txhua yam no tshwm sim, qhov nruab nrab, kwv yees li 2 lub lis piam tom qab koj lub sijhawm kawg.
Dab tsi yog qhov tseem ceeb ntawm fertilization?
Tseem ceeb ntawm Fertilization :1) Fertilization xyuas kom diploid ntawm cov kab mob los ntawm kev sib xyaw ntawm cov txiv neej thiab poj niam gametes. 2) Fertilization muab txoj cai tshiab rau lub zygote. 3) Fertilization ua kom cov txheej txheem metabolic thiab tus nqi ntawm cov protein synthesis ntawm lub qe.
Pom zoo:
Cov kab mob tseem ceeb ntawm kev txhawj xeeb thaum tham txog cov txheej txheem cov kab mob hauv cov ntshav yog dab tsi?
Cov kab mob tseem ceeb ntawm kev txhawj xeeb yog tib neeg kev tiv thaiv kab mob tsis zoo (HIV), kab mob siab B (HBV), thiab kab mob siab C (HCV). Cov neeg ua haujlwm thiab cov tswv ntiav haujlwm yuav tsum ua kom muaj txiaj ntsig ntawm kev tswj hwm kev tsim vaj tsev thiab kev ua haujlwm txhawm rau tiv thaiv kom tsis txhob muaj ntshav thiab lwm yam kua hauv lub cev
Dab tsi yog ob lub fertilization piav qhia txheej txheem ntawm ob zaug fertilization?
Ob chav fertilization yog ib tug complex fertilization mechanism ntawm flowering nroj tsuag (angiosperms). Cov txheej txheem no koom nrog cov poj niam gametophyte (megagametophyte, tseem hu ua embryo sac) nrog ob tug txiv neej gametes ( phev ). Qee cov nroj tsuag tuaj yeem tsim polyploid nuclei
Cov xwm txheej tseem ceeb ntawm kev yug me nyuam hauv tib neeg yog dab tsi?
Cov xwm txheej tseem ceeb ntawm kev yug menyuam hauv tib neeg yog raws li hauv qab no: Gametogenesis: Nws yog qhov tsim ntawm gametes. Insemination: Nws yog kev hloov cov phev los ntawm tus txiv neej mus rau qhov chaw mos ntawm tus poj niam. Fertilization: Cleavage: Implantation: Placentation: Gastrulation: Organogenesis:
Qhov txawv ntawm kev tswj hwm qhov xwm txheej tseem ceeb thiab kev kho yog dab tsi?
Kev kho hlwb yog ib txwm xa los ntawm kws tshaj lij kho mob hlwb, tab sis CISM tuaj yeem muab los ntawm cov kws tshaj lij ntawm txhua yam. Lub hom phiaj ntawm CISM yog los tswj cov kev raug mob tam sim ntawd thiab txo kev ntxhov siab, qhov kev kho puas siab puas ntsws cuam tshuam nrog ntau yam ntawm cov hom phiaj luv luv thiab ntev mus rau kev loj hlob thiab kev hloov pauv
Dab tsi yog qhov xwm txheej tseem ceeb hauv kev tsim cov ntshav txhaws?
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