Human Reproduction and Care of Developing Fetus Flashcards Preview

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Flashcards in Human Reproduction and Care of Developing Fetus Deck (35)
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1

It is the union of the ovum and a spermatozoon, in the outer 3rd of the fallopian tube, in the ampullar segment

Fertilization

2

Known as the beginning of pregnancy

Fertilization

3

The mature ovum is surrounded by

ZONA PELLUCIDA and the CORONA RADIATA

4

What do the ZONA PELLUCIDA and the CORONA RADIATA do?

Both serve to increase the bulk of the ovum and serve as buffers against injury

5

is released by the sperm & dissolves the protective CORONA RADIATA

HYALURONIDASE

6

Multiple sperm enter leading to abnormal growth

HYDATIDIFORM MOLE

7

How does a zygote form?

After the process of entering through HYDATIDIFORM MOLE, the chromosome material then fuses and that's how the zygote form.

8

T/F during ovulation, cervical mucus is large making the sperm able to penetrate it

F. The cervical mucus should be thin in order for the sperm to penetrate it

9

Sperms reach the cervix within 80 seconds & the outer end of the fallopian tube within 5 minutes after disposition

ORGASM

10

Sperm move by the wavelike movement of the flagella and uterine contractions through the cervix, body of the uterus into the fallopian tube toward the waiting ovum

PHONONES/Song of the sperm

11

changes in the plasma membrane of the sperm head, which reveal the sperm-binding receptor sites

Capacitation

12

It is large cells tend to collect at the periphery of the ball, leaving a fluid space surrounding an inner cell mass and is termed as

Blastocyst

13

What are the parts of the Blastocyst?

Trophoblast, embryoblast, and blastocyst cavity

14

How many days does the implantation (NIDATION) or contact between the blastocyst and the endometrium occur?

Occurs 8 to 10 days after fertilization

15

Promotes milk production

Prolactin

16

Relaxes CT of the symphysis pubis & pelvic ligaments promotes cervical dilatation

Relaxin (peptide hormone)

17

Potent, hormone-like fatty acid

Prostaglandins

18

What are the 3 phases of Implantation?

1. Apposition
2. Adhesion
3. Invasion

19

blastocyst brushes against the endometrium

Apposition

20

blastocyst attaches to the surface of the endometrium

Adhesion

21

blastocyst settles down into the soft folds of the endometrium receiving the nourishment of glucogen, mucoprotein from the endometrial glands

Invasion

22

How does a zygote form once it is implanted?

Embryo

23

lies directly under the embryo (or the portion where the trophoblast cells are establishing communication with maternal blood vessels)

Decidua basalis

24

the portion that stretches or encapsulates the surface of the trophoblast

Decidua capsularis

25

The remaining portion of the uterine lining

Decidua vera

26

Supply nourishment only until implantation after which

Yolk Sac

27

What are the 2 layers of the outer portion?

syncytiotrophoblast & cytotrophoblast

28

outer layer or syncytial layer

syncytiotrophoblast

29

The inner layer, present at 12 days gestation and also called as Langhans Layer

cytotrophoblast

30

It provides a circulatory pathway that connects the embryo to CV of the placenta

Umbilical Cord