Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

repro > W6 Embryogenesis, Maternal Recognition of Pregnancy & Placentation > Flashcards

W6 Embryogenesis, Maternal Recognition of Pregnancy & Placentation Flashcards

1
Q

Syngamy

A

Fusion of the male and female pronuclei

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Embryo

A

organism in the early stages of development

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Fetus

A

Potential offspring that is recognisable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

COnceptus

A

product of cenception (embryo and extraembryo membranes)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Morula

A

early embyo, has a ball of cells called blastomeres

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Blastocyst

A

Developed from the morula- has inner cell mass and a cavity called blastocoele

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Attachment

A

Attachment of the conceptus to the endometrial wall

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

4 Steps before attachment

A

Development within confines of the zona pellucida

Hatching of blastocyst from the zona pellucida

Maternal recognition of pregnancy

Formation of the extraembryonic mambranes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

After fusion of male and female pro nuclei

A

Single celled embryo, (zygote) undergos mitotic divisions, called cleavage divisions. first on generagtes 2 celled embryo (blastomeres) these then divide to 4, 8 ,16 daughter cells = can be offspring

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Totipotency

A

Ability of a cell to develop into a fully formed individual

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What hatches from zona pellucida

A

Blastocysts which develop from morula

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Hatching of the blastocyst

A

Governed by 3 forces

Growth and fluid accumulation within blastocyst

Production of enzymes by the trophoblastic cells (weaken zona pellucida)

Contractions of the blastocyst (causes intermittent pressure rupture zp)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Maternal Recognition of Pregnancy - requirements for survival

A

Adaquate Luteal function

Adequate progesterone synthesis

Progestone responseive uterus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Development of Extra Embryonic membranes

A

Prettachement period is long
Repid embryonic growth mainly due to formation of extra embryonic membranes
Essential for embryo attachment to the uterus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Types of Extra embryonic membranes

A

Yolk Sac
Chorion
Amnion
Allantois

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

2 mammalian embryos

A

Long pre attachment period (several weeks - domestic animals)
Extensive extra-embryonic membranes form by folding process

Implantation soon after uterine entry (primates, rodents)
-Extra embryonic membranes form after implantation or attachment

17
Q

development of extra embryonic membranes Bovine

A

13-17 Day 14 embryonic growth

18
Q

development of extra embryonic membranes Pig

A

Day 11-12

19
Q

Fetal Membranes

A 
Yolk sac
Amnion
Allantois
Allantochorion
Umbilical cord
20
Q

Yolk sac

A

Regresses in size

21
Q

Amnion

A

Encloses fetus and provides protection

22
Q

Allantois

A

Collects waste -urine

23
Q

Allantochorion

A

Fetal contribution to the placenta and provides surface for attachemnts

24
Q

Umbillical Cord

A

Amnion wrapped around yolk stalk

repro (17 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions