卵母細胞生成過程
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Questions and Answers

出生前卵母細胞的生成過程中,初級卵母細胞受到什麼分泌物的抑制?

oocyte maturation inhibitor(OMI)

初級卵母細胞停滯在第一減數分裂的哪個階段?

前期(prophase)

何時形成透明帶(zona pellucida)?

初級濾泡形成時

女嬰的卵巢中大約有多少個初級卵母細胞?

<p>大約有200萬個初級卵母細胞。</p> Signup and view all the answers

當初級濾泡擁有超過一層的濾泡上皮細胞時,稱為什麼?

<p>次級濾泡。</p> Signup and view all the answers

初級卵母細胞在出生後停留在第一減數分裂前期的狀態特稱為什麼?

<p>dictyotene。</p> Signup and view all the answers

胚胎第多少週時,生殖腺脊逐漸向其下方的間充質產生細胞?

<p>第5週</p> Signup and view all the answers

胚胎第多少週時,原始生殖細胞向生殖腺脊深部遷徙?

<p>第6週</p> Signup and view all the answers

原始生殖細胞在第多少週時進入初級性索內?

<p>第7週</p> Signup and view all the answers

肝臟的發育過程是如何進行的?

<p>肝臟、膽囊、膽管都由前腸尾端的腹側衍生而來,肝芽是肝臟的前身,延伸至橫中隔(septum transversum)內,隨後此部分形成腹側腸繫膜,之後肝芽在腹側腸繫膜分成頭部(肝原基)、尾部(膽囊原基)</p> Signup and view all the answers

肝芽的起源是什麼?

<p>肝芽也稱肝索,是內胚層細胞衍生</p> Signup and view all the answers

肝臟的功能在胚胎發育的哪個時期開始出現?

<p>胚胎造血功能一開始由卵黃囊負責,第六週時改由肝臟負責</p> Signup and view all the answers

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