Brainscape's Knowledge GenomeTM

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


See full index

OB - Spring 2016 > Chapter 6 - Conception and Prenatal Development > Flashcards

Chapter 6 - Conception and Prenatal Development Flashcards

1
Q

Gametes =

Somatic cells =

A

Gametes = sex cells.

Somatic cells = body cells.

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

Mitosis = def

A

diploid number of chromosomes (46)is retained in the new cell

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

Meiosis - what happens?

A

23 chromosomes (not all, half) are made.

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

Oogenesis - def

A

formation of female gametes

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

Primary oogonium begins its first meiotic division during fetal life but doe snot complete the process until ____

A

Puberty

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

By the 30th week of gestation, the female fetus has all the ova she will ever have. T/F?

A

True

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

What is spermatogenesis?

A

The formation of sperm

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

Sperm determines the sex of the baby. T/F?

A

True

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

Before ovulation, several oocytes begin to mature under the influence of FSH and LH. T/F?

A

True

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

Sperm - they don’t go through any changes once they enter the vajeen. T/F? What is it called?

A

FALSE - they have to go through some changes, called capacitation.

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

When is the pre-embryonic period?

A

First 2 weeks after conception.

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

Around the 4th day after conception, the fertilized ovum, now called a _____, enters the uterus.

A

ZYGOTE

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

What is the conceptus?

A

Cells and membranes resulting from fertilization of the ovum)

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

Morula - def?

A

12-16 cell stage of the fetus

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

What is the decidua?

A

Endometrium during pregnancy

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

Implantation and survival of the conceptus requires a continuing supply of __ and ___

A

Estrogen and progesterone.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

The zygote secretes ___ to tell the woman’s body that she’s pregnant!

A

HCG

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Normal implantation occurs in the __ uterus.

A

Upper

19
Q

A small amount of bleeding can occur as the zygote implants…T/F?

A

True - which is why some women think they’ve actually had their period

20
Q

Embryo - week __ to __

A

3-8

21
Q

During the embryonic phase, structure are particularly at risk for harm by __

A

Teratogens - because they’re developing so fast!

22
Q

Embryo’s develop - cephalocaudal, central to peripheral and simple to complex. T/F?

A

True

23
Q

What is a full-term baby?

A

36-40 weeks of fertilization age or 38-42 weeks of gestational age.

24
Q

Fertilization age - approximately 2 weeks longer than the gestational age. T/F?

A

FALSE - it’s shorter.

25
Q

Implantation is complete by the end of the ___ week after fertilization.

A

2nd

26
Q

The CNS begins developing during the __ week.

A

3rd

27
Q

The primitive/tubular heart begins beating at day __ to __.

A

22-23

28
Q

Neural tube closes during the ____ week - if not, problems occur.

A

4th

29
Q

When is the fetal period?

A

9 weeks after conception and ends with birth.

30
Q

Weeks 13-16 - what is quickening?

A

First fetal movements.

31
Q

Weeks 21-24 - lungs are beginning to produce ___.

A

Surfactant - makes it easier to breathe.

32
Q

Weeks 25-28 - baby starts to move head down. T/F/

A

True

33
Q

Maternal and fetal blood typically don’t mix in the placenta, however……

A

They can! Like if there’s trauma, or during childbirth, etc.

34
Q

Fetal HgB can carry 20-50% more oxygen than adult hemoglobin. T/F?

A

True

35
Q

What is the bag of waters?

A

Two fetal membranes - the amnion (inner) and chorion (outer)

36
Q

Amniotic fluid - about ___ ml by end of pregnancy.

A

700-800

37
Q

Umbilical vein - action

Umbilical artery - action

A

Vein = brings oxygen and nutrient rich blood back to the placenta.
Artery - takes waste and such away from placenta, back to the mom.

38
Q

What are the 3 blood shunts in the baby?

A

Ductus venosus, foramen ovale, ductus arteriosus.

39
Q

What does the ductus venosus do?

A

Shunts blood away from the liver.

40
Q

What does the foramen ovale do?

A

Shunts the blood through the heart - bypasses the lungs.

41
Q

What does the ductus arteriosus do?

A

Shunts the blood from the aorta - we don’t need as much systemically.

42
Q

Monozygotic twins are conceived by the union of a single ovum and spermatozum - T/F/

A

True

43
Q

What are dizygotic twins?

A

Twins that arise from two ova and they are fertilized by two sperm.

OB - Spring 2016 (18 decks)

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