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UE2 BDR > Spermatogenese > Flashcards

Spermatogenese Flashcards

1
Q

L’élongation et la compaction du génome touchent le noyau des spermatocytes I pendant la spermiogenèse

A

non les spermatides

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2
Q

Les mitochondries ne sont plus présentes dans les pièces principale et terminale de la queue du spermatozoïde.

A

vrai QUE piece intermediaire

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3
Q

Les spermatogonies B ont un noyau arrondi.

A

vrai

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4
Q

Les spermatogonies Ad possèdent un noyau arrondi avec une chromatine en amas.

A

chromatine fine = diff de en amas

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5
Q

origine des cell gemrinale

A

epiblastes = spanchppleure extraembryonaaire- allantoide

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6
Q

cell germinales sont d’origine smebyronnires

A

non ectoderme

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7
Q

cb de migraiotn des cell germinales et qd

A

2 : 3e semaine et 5e semaine

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8
Q

epi avant les cretes genitales

A

epi de surface du coleome interne

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9
Q

qui caract gonades est un testicules

A

’’'’pro de sperma’’ =:> presence de tubes seminiferes

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10
Q

cretes genitales : partie somatique faite de l’epaississee,met de l’epin de la cavite colo

A

oui

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11
Q

spermtozoides avt ado

A

NON –> bloque austade de presepermatogonies

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12
Q

enfance : spermatogonines entrees en meiose

A

NON

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13
Q

qd debute meoise chexz la femme

A

multiplicaiton donc foetus

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14
Q

qd GP1 / qd GP2

A

apres phase M1 –>ovulatio

apres phase M2 –> apres fecondation

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15
Q

cell produuites par divisons meioitque femelle sont identiques

A

non GP = cell asym

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16
Q

duree meoise femme

A

des annees

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17
Q

duree mitoses

A

10zinaes de minutes

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18
Q

transcription de sgenes pdt mitose ET meoise

A

non pas mitose

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19
Q

qd transciption de sgenes ds meoise

A

prophase (PAS pdt metaphase) suF XY

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20
Q

transcription de tous les genes pdt meoise prophase

A

non PAS XY

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21
Q

qd duplication des centrosomes pdt meoise

A

prophase 1 leptotene

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22
Q

ct rapprochement des chromosomes pour le synapsis :

A

telomeres

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23
Q

duree du pachytene

A

16jours - prophase 20j meoise 23j

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24
Q

ou sont apparies les gonosomes

A

telomeres

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25
Q

corpuscules XY bien visible en ME >

A

oui

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26
Q

prots du SMC et role

A

structural maintenane of chromosomes

eg cohesine –> lien cx synap et chromatides

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27
Q

qui permet la segregation des chromo homol

A

appriement : rapprocher pour bien lles sepraere

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28
Q

synonyme bivalents

A

tetrade

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29
Q

pq appa necesaire a segregation normales des homologues

A
  1. reconnissane

2. bonne migraiton

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30
Q

toutes les utations sont pathologiques

A

non polymorphise sociales

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31
Q

qd stade propahse STOP ovocyte

A

diplotene

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32
Q

q stade ‘glissement ou terminalisaiotn des chiasmas;

A

dia

33
Q

fuseau de division em meoise 1 unipolaire ou bipolaire

A

unipolaie

34
Q

prot qui permettent accrcahge monopol des MT

A

omnopolin 1 ou MAM1

35
Q

metaphase : migraiotn de la cohesine meme en M1

A

oui : axail a centromere

36
Q

spermatogenese cb de jours

A

74j

37
Q

cb de types de cell spermtogenes

A

3 types cell : spermatogonies - cytes- stides

38
Q

q type de cell realise meoide

A

spermatoCYTE (//ovoCYTE)

39
Q

spermtocyte spermiogenese ?

A

non juste spoermatides

40
Q

q type de cell se divisent par mitose

A

spermatogonIES

41
Q

qd derniere phase de symthes eADN

A

avt spermCYTES donc spertogonies B

42
Q

q cell a un noyau ovalire

A

spermtao gonies ap

43
Q

surnom des spermatogonies B

A

croutelleuses –> chroatine ne amas: B = ‘like beruk =

44
Q

spermtognoies AP et AD iden

A

non Ap = pALe = ovAL

no aDark -> chromatine fine

45
Q

ou sont les spermatocytes

A

traversee de BHT

46
Q

TAILLE ET FORME DES spermtocytes

A

grand ovalaire (prespermtozoides)

47
Q

spercytes: bivalents bien visible sou non

A

bien visibles

48
Q

spcytes au conatc de MB ?

A

non

49
Q

BHT composants et role

A

isoler cell post meio du sg

endothelium mb jonciotns serres de sertoli peri MB des tubes seminifere

50
Q

pq spermatocytes II difficile a repere

A

stade rapide = fugace

51
Q

spermatides : division

A

non !

52
Q

spermatide 3 app a quelle famille

A

en cours elongation (pas les jeunes= pas les ondres)

53
Q

angle des 2 centrioles de la flagelle

A

perpendiculaire

54
Q

doublet peripherique de falgelle - m types de MT

A

non MT A : 13

MT B : 10-11 protogilament

55
Q

role des prot entourant MT que coheison

A

non aussi moblite –> dyneides

56
Q

ct MT periph relies aux MT centraux

A

ponts raidaires se terminant par une tete radiaire

57
Q

quoi autour de double central

A

gaine fibreuse

58
Q

diff spermatides et spermatoizoie

A

tide tjs enchasses ds epi seminl

59
Q

forme noyau du spermatozoide

A

ovoiide aplatie

60
Q

3 struc du spermatozoides

A

tete + col (= piece connective) + flagelle

61
Q

diff pole ant et post du noyau du spermatozoide

A

ant : vacuoles

post: esp nucelaire post –> chromatine se detache de env

62
Q

dimensions spermatozoides

A

60mmicrons - 3-4.5 tete - 1..5-3 epaisseur

63
Q

ou ctyplasme ds spermatozoide

A

ds piece connective = col

64
Q

3 elements de picee connective

A

centriole proxi + colonnes SEGmentees + un peu de cyt + plaque basale

65
Q

ou centriole distale

A

piece intermedaire

66
Q

ou 2 renflements symetriques et diametralement opposes (3-*)

A

pice principale

67
Q

quelle piece de la flagelle est la plus grande

A

piece principale (=2 e piece)`

68
Q

entree en mitose reguliere des gonies tous les cb

A

16j

69
Q

tous les tubes seminiferes m aspect

A

non car cell pas au m stade

70
Q

durres dela spermatogense

A

74j : 18ad 9b 23 cytesI 1 cytes II 23 spermatides

71
Q

spermatogenese regulee que endoctrine

A

non para

72
Q

gnrh : peptide ou lipide ?

A

peptide

73
Q

testosterone freine synthese de la LH et FSH ?

A

oui retrocontrole mais QUE LH comme oestro

74
Q

hypogonadotropes : bcp de esto et inhibine activeine

A

non car peu de LH et FSH

75
Q

ou pb si hypogonadotrope

A

axe hypothalomo-hypo

ou syjnthese de LH FSH au niveau de hypophyse

76
Q

hypogonadisme hypergonadotrope : bcp ou peu de FSH LH

A

beaucuop : hyper our retrouver normale

77
Q

cb de receptuer et a quoi sertoli

A

5 : PmodS (cell peritu) - testo (leydig) - cell germi EGF NGF interleukines

78
Q

que secrete cell de sertoli

A

ABP / TGFalpha et IGF (sur leydige)

UE2 BDR (5 decks)

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