Weeks 1-4

Question 1

After fertilization, how long after does birth take place? How long after the onset of the last menstrual period

Answer 1

38 weeks; 40 weeks

Question 2

Premature refers to babies born before

Answer 2

37 weeks from the onset of the last menstraul period.
35 weeks from fertilization

Question 3

Babe tween 37 and 40 weeks from the onset of LMP is known as

Answer 3

Term

Question 4

The development in the embryo is divided into 3 stages. What re they?

Answer 4

Germinal (pre embryonic)
Embryonic
Fetal

Question 5

The germinal period lasts

Answer 5

2 Weeks

Question 6

The embryonic period is between weeks

Answer 6

3-8

Question 7

The organ systems begin to develop During the _______period

Answer 7

Embryonic

Question 8

Formation of the bilaminar germ disk happens during the

Answer 8

Germinal period

Question 9

The highest sensitivity of to congenital malformation (physical birth defect) is during which period

Answer 9

Embryonic

Question 10

The cranial position of a fetus refers to

Answer 10

The head

Question 11

The dorsal position refers to

Answer 11

The spine

Question 12

The caudal position refers to the

Answer 12

Tail

Question 13

The ventral position refers to the

Answer 13

Front

Question 14

Fertilization usually occurs in the_______of the Fallopian tube

Answer 14

Ampullae region

Question 15

With each mitotic division of the zygote, each divided cell and gets smaller and smaller and are called

Answer 15

Blastomeres

Question 16

The membrane which keeps the zygote the same size despite the mitotic divisions is called the

Answer 16

Zoma pellucida

Question 17

The blastomeres and the zona pellucida are collectively called

Answer 17

The morula

Question 18

The outer cell mass of the morulais also called the_______and will give rise to the fetal portion of the

Answer 18

Trophoblasts

Question 19

The inner cell mass of the morula is also called the______since it is where the embryo will form

Answer 19

Embryoblast

Question 20

Prior to implantation, the trophoblasts (outer mass) differentiates into

Answer 20

Cystotrophoblasts
Syncytiotrophoblasts

Question 21

The uterine epithelium is invaded by the________which initiates implantation

Answer 21

Syncytiotroblasts

Question 22

The blastocyst will implant on the_______of the uterus by end of day 6

Answer 22

Posterior superior

Question 23

Ectopic pregnancy happens when when the fertilized egg

Answer 23

Grows outside of the uterus

Question 24

The most common ectopic pregnancies is when the uterus grows in the

Answer 24

Fallopian tubes

Question 25

Tubal pregnancies has signs similar to

Answer 25

Normal pregnancy

Question 26

Tubal pregnancies if left untreated can cause the Fallopian tube to

Answer 26

Rupture

Question 27

Early ectopic pregnancies can be treated with medication called methotrexate _______which essentially kills the zygote

Question 28

Late diagnosis of ectopic pregnancies are treated

Answer 28

Surgically

Question 29

The bilaminar germ disc is formed by

Answer 29

Week 2

Question 30

The space which becomes the bilaminar germ disc are occupied by 2 types of cells. What are they

Answer 30

Epiblast Hypoblast

Question 31

Spaces formed within the syncyttiotropoblasts which allow blood vessels of the mother to fill are called

Answer 31

Trophoblastic lacunae

Question 32

This membrane protects the embryo

Answer 32

Amniotic membrane

Question 33

The bilaminar germ disc is suspended with the_______above it and the_______below it

Answer 33

Amniotic cavity; primitive yolk sac

Question 34

When the extraembryonic cavity dissociates, the outer space surrounding the embryo is now called

Answer 34

Chorionic cavity

Question 35

Gastrulation begins by the end of

Answer 35

Week 2

Question 36

Gastrulation starts with the formation of the

Answer 36

Primitive streak

Question 37

These cells migrate through the primitive streak

Answer 37

Epiblasts

Question 38

After the formation of the primitive streak, the epiblasts invades and replaces these cells

Answer 38

Hypoblasts

Question 39

The mesoderm is divided into 3 sections, composing of 2 of each. What are they

Answer 39

Paraxial Intermediate Lateral

Question 40

The intermediate mesoderm forms the

Answer 40

Kidneys and gonads

Question 41

The lateral mesoderm splits into

Answer 41

Somatic and Splanchnic mesoderms

Question 42

Somatic mesoderms form the

Answer 42

Parietal Serosa Dermis of ventral body region Connective tissues of limbs

Question 43

The splanchnic mesoderm forms the

Answer 43

Heart Blood vessels Wall of digestive and repertory tracts

Question 44

The endoderm forms the

Answer 44

Epithelial lining and glands of digestive and respiratory tracts

Question 45

Ectoderm forms the

Answer 45

Epidermis Hair Nails Brain and spinal cord Neural crest

Question 46

The outer ectoderm forms

Answer 46

Hair Nails Mouth epithelium Lens, cornea

Question 47

The neural crest of the ectoderm forms the

Answer 47

Peripheral nervous system Adrenal medulla Melanocytes Facial cartilage Denting of teeth

Question 48

Neural tube

Answer 48

Brain Neural pituitary Spinal cord Motor neurons Retina

Question 49

Neurulation happens by the embryonic formation of the________by closure of the________

Answer 49

Neural tube; neural plate

Question 50

The neural plate is formed from the

Answer 50

Overlying ectoderm

Question 51

Which neuropore closes first? Anterior Posterior

Answer 51

Posterior

Question 52

In Gastrulation, the hypoblast turns into

Answer 52

Endoderm

Question 53

In Gastrulation, the the epiblasts turn into

Answer 53

The ectoderm

Question 54

Implantation occurs with the syncytiotrophoblasts degrades the ___________of the uterus

Answer 54

Endometrium

Question 55

The blastocyst is composed of which cells

Answer 55

Epiblasts and hypoblasts

Question 56

The prechordial plate consist of which cells

Answer 56

Epiblasts and hypoblasts

Question 57

a characteristic feature/happening during the 2nd week of development is the

Answer 57

Lacunae spaces formed within the syncytiotrophoblast

Question 58

The secondary yolk sac is formed by the end of

Answer 58

Week 2

Question 59

Gastrulation begins by the end of

Answer 59

Week 2

Question 60

The process of a zygote developing into increasingly smaller blastomeres is known as

Answer 60

Cleavage

Question 61

Gastrulation is the formation of the

Answer 61

Trilaminar germ disc

Question 62

This structure surrounds the cells after fertilization as they compact to form the morula

Answer 62

Zona pellucida

Question 63

Implantation occurs on which day post fertilization

Answer 63

Day 6

Question 64

In the 3rd and 4th week of development, the endoderm layer lines the

Answer 64

GI tract in the stomach

Question 65

This germ layer forms the epithelial lining of the of the intestines

Answer 65

Endoderm

Question 66

Hypoblast cells displace into the

Answer 66

Secondary yolk sac

Question 67

Folic acid intake during pregnancy can prevent

Answer 67

Spina bifida

Question 68

Sirenomelia (mermaid syndrome) is caused by a loss of __________in the lumbar sacral region

Answer 68

Mesoderm

Question 69

Failure of The posterior neuropore closing leads to

Answer 69

Spina bifida

Question 70

Anencephaly (deflated head) is caused by the____________not closing

Answer 70

Anterior neuropore not closing

Question 71

Birth takes place__________weeks after the onset of the last menstrual cycle, or___________weeks after fertilization

Answer 71

40;38

Question 72

Development of the fetus develops_________to_________

Answer 72

Cranially;caudally

Question 73

The notochord is derived from the folding of the

Answer 73

Endoderm