Deck 19: Pregnancy: Development From Conception to Newborn

Question 1

The epidermis,nervous system,and adrenal medulla emerge from the:

A)endoderm.
B)mesoderm.
C)ectoderm.
D)epithelium.

Answer 1

C

Question 2

Which layer of the egg contains species-specific receptors for the sperm?

A)A
B)B
C)C
D)D

Answer 2

B

Question 3

Compare IVF to GIFT.

A) IVF fertilization takes place in fallopian tubes, whereas GIFT fertilization takes place in a Petri dish.
B)During IVF and GIFT, fertilization takes place in Petri dishes.
C)During IVF and GIFT, fertilization takes place in the fallopian tubes.
D) IVF fertilization takes place in a Petri dish, whereas GIFT fertilization takes place in the fallopian tubes.

Answer 3

D

Question 4

What is labeled A in this diagram?

A)Endometrial gland
B)Trophoblast
C)Inner cell mass
D)Blastocyst cavity

Question 5

In this diagram,what is labeled A?

A)Yolk sac
B)Embryo
C)Allantois
D)Amniotic cavity

Question 6

When a sperm fertilizes an egg the resulting cell is called:

A)a morula.
B)a blastocyst.
C)an implantation.
D)a zygote.

Question 7

Which would be an accurate description of the step labeled 5?

A)Fertilization
B)Morula
C)Blastocyst
D)Implantation

Question 8

Approximately how many days old is this group of cells?

A)1
B)2
C)4
D)7

Question 9

Some of the mesoderm is destined to become:

A)the nervous system.
B)the teeth.
C)the muscles.
D)the liver.

Question 10

What is the embryo also called at this point of development?

A)Pronucleus
B)Embryo
C)Blastocyst
D)Morula

Question 11

In this diagram,what is the structure labeled A called?

A)Yolk sac
B)Amnionic cavity
C)Trophoblast
D)Embryonic disc

Question 12

During in vitro fertilization,:

A)the husband's sperm is introduced artificially, instead of through intercourse, into the woman's vagina.
B)the husband's sperm is used to fertilize an oocyte that is from a donor other than his wife.
C)fertilization happens in a laboratory glassware.
D)a woman is treated with fertility hormones and then given donated sperm from a man other than her husband.

Question 13

An ovum is viable for up to _____ hours after ovulation.

A)12
B)14
C)48
D)72

Question 14

Sperm must penetrate the _______________,the outer layer of the ovum,in order to fertilize it.

A)corona radiata
B)trophoblast
C)zona pellucida
D)reticular layer

Question 15

The epidermis of the skin comes from which embryonic layer?

A)Ectoderm
B)Epiderm
C)Endoderm
D)Mesoderm

Question 16

The embryonic period lasts from fertilization through the _______ week of development.

A)2nd
B)4th
C)8th
D)16th

Question 17

Which statement is true regarding the yolk sac?

A)Only animals that develop outside the mother, like a chicken, have yolk sacs.
B)The yolk sac in a human is inactive.
C)The placenta and yolk sac are synonymous.
D)The yolk sac will help to form the digestive system.

Question 18

A sperm fuses with the oocyte membrane in a process called:

A)fast block.
B)capacitation.
C)syngamy.
D)differentiation.

Question 19

How many days old is this embryo?

A)14
B)21
C)25
D)35

Question 20

In this diagram,what is labeled B?

A)Embryo
B)Uterus
C)Yolk sac
D)Umbilical cord

Question 21

Immediately after fertilization,paternal genes are being expressed due to the presence of the sperm whereas maternal genes are inactive at this point.

Question 22

Which chromosome-sampling test is able to determine genetic anomalies earliest in a pregnancy?

A)Amniocentesis
B)Chorionic villus sampling
C)Ultrasound
D)4D ultrasound

Question 23

Which description would be correct for the arrow labeled A?

A)Estrogen (milk production)
B)Oxytocin (milk ejection)
C)Follicle stimulating hormone (milk production)
D)Human growth hormone (breast development)

Question 24

The amnion provides a diffusion area for the amniotic fluid.

Question 25

During the mid-blastula phase,translation of paternal RNA is extremely high,but the egg's mRNA is relatively silent.

Question 26

Epigenetics is a field that studies?

A)Dysmorphology and Teratology
B) Development of the embryo into a fetus
C) Interaction between environment and genetics
D)Embryonic development only

Question 27

The major hormone promoting the production of milk is:

A)oxytocin.
B)estrogen.
C)progesterone.
D)prolactin.

Question 28

A "breech baby":

A)is when the baby is born before 37 weeks of gestation.
B)is when the baby is delivered by cesarean section.
C)is when the baby fails to gain weight like other babies its age.
D)is when the baby's position in the womb makes it difficult to deliver because the buttocks or feet are lower than the head.

Question 29

Gender differentiation occurs at approximately:

A)5 weeks.
B)5 months.
C)7 weeks.
D)7 months.

Question 30

Which stage of labor is depicted here?

A)Dilation
B)Expulsion
C)Placental
D)Birth

Question 31

The fetal stage refers to the period immediately following birth.

Question 32

By week ___,all of the major organs and organ systems are present,though not fully functional.

A)2
B)4
C)6
D)8

Question 33

What indication below signifies the fetus has dropped?

A)More frequent urination and defecation
B)Quickening
C)A full feeling in the stomach
D)Trouble catching your breath

Question 34

Which hormone is responsible for positive readings in early pregnancy tests?

A)Human growth hormone
B)Human chorionic gonadotropin
C)Leutenizing hormone
D)Estrogen

Question 35

What usually follows the drop of the cervical mucus plug?

A)Afterbirth
B)Expulsion
C)"Water-breaking"
D)Dilation

Question 36

The trophoblast assists in implantation by digesting the endometrium.

Question 37

Quickening occurs during the?

A)Late embryonic stage
B)First trimester
C)Second trimester
D)Third trimester

Question 38

The sucking response (sucking fingers and thumbs)is usually seen in the:

A)morula stage.
B)first trimester.
C)second trimester.
D)third trimester.

Question 39

Identify the region indicated by the arrow.

A)Chorionic villi
B)Amnion
C)Allantosis
D)Amniotic fluid

Question 40

How does a fetus obtain oxygen?

A)Fetal hemoglobin 'steals' oxygen from maternal hemoglobin at the placenta.
B)Fetal lungs absorb oxygen from the amniotic fluid.
C)Maternal blood mixes with fetal blood at the placenta.
D)Fetal blood enters the maternal circulatory system and enters maternal lungs.

Question 41

If the labor needs to be induced,pitocin,a synthetic form of prolactin,will be given intravenously.

Question 42

The second trimester sees the beginning of surfactant secretion,an important chemical that prevents the alveoli of the lungs from collapsing.

Question 43

In the developing embryo and fetus,waste removal and nutrient circulation are accomplished by simple diffusion.

Question 44

Once the baby's head pushes through the vagina,the body follows quickly.

Question 45

The placenta develops from the chorion,the outermost of the extraembryonic membranes.