Intro to Embryology Flashcards Preview

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Flashcards in Intro to Embryology Deck (26)
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1

FSH AND LH are released where and when?

ANTERIOR PITUITARY GLAND, PRIOR TO FERTILIZATION

2

Name the uterine tube segments after leaving the ovary

Ovary -> fimbriae -> infundibulum -> ampulla -> isthmus

3

? - > sperm

Spermatogonia

4

? -> oocyte

Oogonia

5

What is the maturation of sperm called?

Spermatogenesis

6

What is Teratology?

The study of abnormal development

7

What is the embryonic period?

Fertilization to 8 weeks

8

What is the fetal period?

Week 9 to term

9

What happens during embryonic period?

Initial development of all major structures and establishment of all organ systems

10

What happens during fetal period?

Differentiation and growth of organs and tissues

11

What is capacitation?

Surface proteins removed from acrosome and allows acrosome to react with corona radiata and ZP and release enzymes

12

What is acrosome reaction?

Occurs on contact with ZP, release of enzymes, allows penetration of ZP and facilitates fertilization

13

What are the phases of fertilization?

Coronal cells, acrosomal reaction, plasma membranes fuse, meiosis 2 resumes, meabolism of oocyte increases

14

What is a zygote?

Haploid pronucli fuse, forming diploid

15

What are blastomeres?

Early embryonic cells after zygote undergoes cleavage

16

What is a morula?

A blastomere with 12-32 cells (3-4d). ORGANIZATION STARTS TAKING PLACE

17

What is a blastocyst?

Fluid enters the blastocystic cavity, separates the blastomeres, and the ZP degenerates

18

What happens during prophase 1?

Baby is born and oocytes halt

19

When does attachment happen?

Day 6

20

When does differentiation of the trophoblast happen?

Day 7

21

What are the 2 parts of the trophoblast?

Cytotrophoblast - not embedded
Syncytiotrophoblast - embedded

22

What is an ectopic pregnancy?

Blastocyst implants outside normal uterine locations

23

What happens during puberty?

Oocytes begin meiosis again and finish meiosis 1. FSH and LH surge

24

What is a hypoblast?

Small cuboidal cell formed from the embryoblast - primary endoderm

25

What happens before ovulation?

Egg is halted at metaphase 2, ovulation causes oocyte to enter Fallopian tube

26

Where does egg finish second stage of meiosis?

Fallopian tube