Embryology- Embryonic Period

Question 1

What occurs in the 3rd week of development?

Answer 1

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Question 2

What is the first stage of gastrulation?

Answer 2

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Question 3

Describe the Primitive streak

Answer 3

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Question 4

During gastrulation- what processes do the mersoderm cells undertake?

Answer 4

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Question 5

Structures associated with the primitive streak

Answer 5

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Question 6

What is the significance of the epiblast?

Answer 6

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Question 7

What is the significance of the time and ingression through the primary streak?

Answer 7

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Question 8

What are the structures in the cranial end of the embryonic disk?

Answer 8

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Question 9

Buccopharyngeal membrane

Answer 9

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Question 10

Prechordal plate

Answer 10

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Question 11

Notocord

Answer 11

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Question 12

Notochord formation.

Answer 12

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Question 13

What does the notochord underly?

Answer 13

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Question 14

Neurenteric canal

Answer 14

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Question 15

Cloacal membrane

Answer 15

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Question 16

Allantois

Answer 16

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Question 17

When does the establishment of body axes take place?

Answer 17

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Question 18

Discuss growth of embryonic disk

Answer 18

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Question 19

Development of the trophoblast

Answer 19

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Question 20

In the 3rd week, what do mesoderm cells differentiate into?

Answer 20

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Question 21

Development of trophoblast/ end of 3rd week

Answer 21

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Question 22

Development of trophoblast/ end of 3rd week ‘encircling’

Answer 22

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Question 23

Development of trophoblast/ end of 3rd week- maternal vessels

Answer 23

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Question 24

Stem vs terminal tertiary villi

Answer 24

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Question 25

What occurs in the 3rd-8th weeks ?

Answer 25

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Question 26

Ectoderm derivatives

Answer 26

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Question 27

What is neuralation?

Answer 27

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Question 28

What does the neural plate form?

Answer 28

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Question 29

Neural groove

Answer 29

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Question 30

What does the neural groove form?

Answer 30

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Question 31

Neural tube formation

Answer 31

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Question 32

Neural tube closure

Answer 32

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Question 33

What drives neuronal specification ?

Answer 33

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Question 34

How does the neural crest form?

Answer 34

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Question 35

Where do neural crest cell migration

Answer 35

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Question 36

Neural crest derivatives

Answer 36

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Question 37

Ectodermal placodes

Answer 37

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Question 38

Mesoderm

Answer 38

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Question 39

Mesoderm derivatives

Answer 39

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Question 40

Describe the main mesodermal divisions

Answer 40

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Question 41

Mesoderm partition- paraxial

Answer 41

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Question 42

Mesoderm partition - intermediate and lateral

Answer 42

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Question 43

Paraxial mesoderm development/ segmentation

Answer 43

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Question 44

Somite

Answer 44

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Question 45

When are somites visible as ball like structures?

Answer 45

Day 28

Question 46

Somite differentiation

Answer 46

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Question 47

What do dermomyotome cells form?

Answer 47

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Question 48

When does sclerotome differentiation occur?

Answer 48

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Question 49

What do sclerotome cells differentiate into?

Answer 49

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Question 50

What do myotomes and dermatomes retain

Answer 50

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Question 51

What genes regulate body plan?

Answer 51

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Question 52

Development of intermediate mesoderm

Answer 52

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Question 53

Development of lateral plate mesoderm

Answer 53

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Question 54

What does the lateral mesoderm contribute towards?

Answer 54

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Question 55

Difference between mesoderm vs mesenchyme

Answer 55

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Question 56

What precursor do vessels and blood cells from from?

Answer 56

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Question 57

When do hemangioblasts appear in mesoderm surrounding the wall of the yolk sac?

Answer 57

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Question 58

Formation of cardiogenic field

Answer 58

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Question 59

Implication of rapid growth of developing Brain

Answer 59

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Question 60

Endoderm derivatives

Answer 60

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Question 61

Derivatives of the endothermic germ layer

Answer 61

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Question 62

Derivatives of the three germ layers

Answer 62

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