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Theriogenology > Unit 3 > Flashcards

Unit 3 Flashcards

1
Q

Process of cocyte formation

A

o0genesis

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2
Q

Goal of oogenesis

A

Produce egg w/ massive amount of cytoplasm

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3
Q

His the release of mature egg from the ovary

A

Ovulation

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4
Q

Primordial germ cells (PGCs) from yolk
sac endoderm migrate to and colonize
the genital ridge (developing ovary)
Then PGCs differentiate to oogonia
Then - Diploid oogonia undergo mitosis prior
to or shortly after parturition

A

Embryogenesis

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5
Q

Oogonia are called – when they undergo meiosis

A

Primary oocytes

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6
Q

At birth, all oocytes are arrested in -_ until –

A

Prophase of meiosis I

Ovulation.

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7
Q

Selected follicles grow in size and develop larger antral spaces at….

A

Sexual maturity

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8
Q

2 bodies of primary oocyte

A

Secondary oocyte and 1st polar body

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9
Q

Chromosome number is reduced from diploid to haploid in

A

Folliculogenesis

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10
Q

Meiosis I is completed after ovulation in what animal

A

Horse, dog

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11
Q

After ovulation, meiosis ii in secondary oocystes halts at – until fertilization

A

Metaphase Il

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12
Q

In fetus,- begins

A

Meiosis I

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13
Q

Donny childhood, –’ are inactive

A

Primary

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14
Q

During puberty – divide

A

primary oocytes

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15
Q

During fertilization, sperm enters –

A

Secondary oocyte

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16
Q

Consists of a primary oocyte and a
single layer of flattened follicular cells

A

Primordial follicle

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17
Q

Consists of a primary oocyte with a single layer
of cuboidal/columnar follicular cells

A

Primary follicle

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18
Q

-Consists of several layers of cuboidal/columnar follicular
cells, (membrana granulosa) which begin to secrete follicular fluid
-Secondary-vesicular follicle: presence of pockets of follicular fluid within the membrana granulosa

A

Secondary follicle

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19
Q

Death of a follicle at any stage in its development

A

Follicular atresia

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20
Q
  • A ruptured graafian follicle containing
    a blood clot that is absorbed as the cells
    lining the follicle form the corpus luteum
A

Corpus haemorarghicum

21
Q

Yellow endocrine body formed at the site of
a ruptured ovarian follicle immediately after
ovulation

A

Corpus luteum

22
Q

White fibrous scar tissue formed after the
involution anc
regression of the corpus
luteum

A

Corpus albicans

23
Q

Yellow endocrine body formed at the site of
a ruptured ovarian follicle immediately after,
ovulation

A

Corpus luteum

24
Q

Glycoprotein membrane surrounding the
plasma membrane of an oocyte

A

Zona pellucida

25
Q

Cuboidal cells that form a barrier around
developing oocyte follicles within the
ovary

A

Granulosa cells

26
Q

granulosa cell layer adjacent to
zona
pellucida
- Innermost layer of cumulus oophorus
Supply vital proteins to the oocyte

A

Corona radiata

27
Q

-Cluster of cells around the oocyte
Coordinates with follicular development
and oocyte maturation
- Penetrated by spermatozoa during fertilization

A

Cumulus oophorus

28
Q

Formed in growing secondary follicle

A

Theca cells

29
Q

Part of a follicle that provides structural support

A

Theca cells

30
Q

Part of a follicle that produce androgens in the presence of lh w/ are converted to E2 by Fsh

A

Theca cell,

31
Q

Becomes small lutein cells and produce P4
after ovulation in CL

A

Theca cell

32
Q

Highly selective process
Few follicle attain dominant status, the rest undergo atresia

A

Ovarian folliculogenesis

33
Q

Have 2 or 3 sequential waves of follicular development

34
Q

What animal

Waves of follicular growth & estradiol production
occur q10days during the breeding season

35
Q

In mare, Cl regresses around day

36
Q

In what animal is follicles continuously grow during the estrous cycle

37
Q

There is no appearance of dominant follicles in what animal

38
Q

In sow, significant growth of selected follicle our on days - of estrus cycle

39
Q

Type of follicle that have much higher levels of estradió in follicular fluid

A

Dominant follicle

40
Q

GranuIosa calls of dominant follicle produces more

41
Q

In ovulation, Fsh stimulates — to start again in preovulatory oocyte

42
Q

— surge causes increase in follicular fluid: follicle swells and makes granulosa cells convert to progesterone production

43
Q

Thecal layers become – in ovulation

44
Q

What happens in granulosa calls during ovulation?

A

Dissociate

45
Q

As follicle increases in size, estradiol level

46
Q

In the absence of progesterone what will happen?

A

Estradiol level increases and causes lh surge then leads to ovulation

47
Q

Induced ovulator animals

A

Rabbit, cat, camel

48
Q

Lh surge induced by

A

Intromission

49
Q

Example of spontaneous ovulator

A

Farm animals and humans

Theriogenology (7 decks)

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