segmentacion Flashcards

1
Q

1º semana de gestacion

A

DIAS
1. FECUNDACION
2. segmentacionb
3. morula
4. blastocisto
5. eclosion

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2
Q

segmentacion

A

mitosis repetida para tener mas celulas o blastomeros
va de 2 en dos

DIA 2

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3
Q

compactacion

A

8 blastomeros se unen por comunicacion entre si y comparten moleculas

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4
Q

MORULACION

A

se forma la mórula (16-32 blastómeros) cubierto de zona pelucida por masas celulares ya no son pluripotencialesson toti

DIA 3

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5
Q

morula

A

12- 16 blastomeros a 32 blastomeros
recubierto de zpona pelucida
totipotenciales

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6
Q

masizo celular externa

A

trofoblastos

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7
Q

masizo celular interna

A

embrioblastos

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8
Q

que formara el embrioblasto y el trofoblasto

A

embrioblasto –> embrion
trofoblasto –> placenta

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9
Q

cuando entra la morula al utero

A

entre el dia 3 y 4

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10
Q

BLASTULACION

A

formacion de blastocitos, paso de morula a blastocito
bomb de liq mci periferia y mce rodea se forma blastocele con liquido

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11
Q

BLASTOCITO FORMACION

A

liq uterino atravesar la zona pelucida forma blastocele y cavodad blastpcistica

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12
Q

blastocele

A

cavidad con liquido formda por blastulacion

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13
Q

en la blastulacion a donde van los macizos

A

ext –> se pega a zona pelucida
int –> se va a una orilla
la cavidad se llena de liquido

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14
Q

eclosion

A

la zonanpelucida desaparecer
el blastocito crece y se nutre de secreciones uterinas
prepara implantcion

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15
Q

errores en mitosis en segmentacion

A

trisnomia 21 monosomia 21
mosaicismo

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16
Q

mosaicismo

A

error en la mitosis
presencia de 2 o más lineas geneticas diferentes de un solo cigoto

17
Q

quimerismo

A

error por la replicacion
2 o mas lineas celulares gen diferentes pero que provienen de cigotos diferentes