Spermatozoidul si ovocitul Flashcards

1
Q

dimensiuni

A

lungime 50-60 microni
grosime 1-3 micron

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2
Q

ce proprietate nu poseda?

A

reproducere

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3
Q

alcatuit din

A

cap
flagel

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4
Q

capul

A

5 microni, eliptic/ovalar
nucleu cu granitura cromozomiala haplida 23X sau 23Y
acrozom situat apical , contine enzime proteolitice

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5
Q

flagelul

A

40-5- microni
gat + coada

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6
Q

gatul

A

segment scurt de leg dintre cap si coada

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7
Q

coada

A

prezinta 3 parti
intermediara
principala
terminala

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8
Q

partea intermediara

A

=corpul spermiei
filament axial= axonema
intre gat si inelul flagelului
n jur se dispune teaca mitocondriala cu rol energetic

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9
Q

partea principala

A

40 microni
axonema invelita in teaca fibroasa

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10
Q

partea terminala

A

axonema descoperita fara teaca
aspect de buchet - 8-11 filamente componente

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11
Q

Mobilitate

A

devine mobila in ductul deferent
viteza 2-3mm/min

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12
Q

nr de spermii

A

1ml=60-120 mil
<20 mil =oligospermie

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13
Q

valabilitate

A

cateva sapt in testicul
3-4 zile in tract genital fem
puterea fecundanta = 24h!!!

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14
Q

ce diminueaza viata spermiilor?

A

t> 28 grade
mediul acid

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15
Q

ovocitul

A

cea mai mare celula
120-150 microni
format din nucleu ,citoplasma, ovolema

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16
Q

nucleul ovocitului

A

rotund,
central sau excentric
formula crom haploida

17
Q

citoplasma ovocitului

A

alc din citoplasma si deuteroplasma (citop nutritiva)

18
Q

ovulul matur in folic tertiar rezinta urmatoarele invelisuri

A

zona pellucida
corona radiata
spatiu perivitelin

19
Q

maturizarea ovulului si ovulatia pot fi inhibate prin

A

contraceptie hormonala
inhibarea secretei de LH

20
Q

maturizarea ovulului si ovulatia pot fi inhibate prin

A

contraceptie hormonala
inhibarea secretei de LH