Embryology

Question 1

During the first week fertilization occurs when the

Answer 1

Sperm passes through Corona Radiata, then Zona Pellucida

Question 2

Mitosis of the zygote forms a ball of cells, or a ________

Answer 2

Morula

Question 3

Fluid enters the Zona Pellucida and separates the Blatomeres into _____ and _____

Answer 3

Trophoblast

Embryoblast/Inner Cell Mass

Question 4

Formation of Trophoblast and Inner Cell Mass notes formation of

Answer 4

Blastocyst

Question 5

The Trophoblasts will differentiate into

Answer 5

Syncitiotrophoblast

Cytotrophoblast

Question 6

______ induces endometrial stroma

Answer 6

Syncitiotrophoblast

Question 7

A ______ will appear between Trophoblast and Inner Cell Mass during the 2nd week

Answer 7

Amniotic Cavity

Question 8

The amnion is formed by

Answer 8

Amnioblasts from Cytotrophoblast

Question 9

During the 3rd week the development of the 3-layred embryo begins as cells migrate between _____ and _____ to form the Mesoderm

Answer 9

Ectoderm and Endoderm

Question 10

Within the _____ is the Primitive Streak

Answer 10

Ectoderm

Question 11

The Primitive Streak is composed of

Answer 11

cells hat pass through cephalic region to form notochord process

Question 12

The mesoderm will differentiate into ______, _____ and ______ Mesoderm

Answer 12

Paraxial
Intermediate
Lateral

Question 13

Paraxial Mesoderm breaks into segmented blocks called ______

Answer 13

Somites

Question 14

Myotome becomes_____, Sclerotome becomes ______, and Dermatome becomes _______

Answer 14

Muscle mass
Vertebrae and discs
CT of skin

Question 15

Intermediate Mesoderm gives rise to

Answer 15

Urogenital System

Question 16

Lateral Mesoderm gives rise to

Answer 16

CT of muscles and viscera
Serous Membrane
Cardio and Lymph System
Spleen
Adrenal Cortex

Question 17

Notochord process thickens to become ______ and eventually become ______

Answer 17

Neural Fold

Neural Tube

Question 18

Lateral folding that occurs during the 4th week of embryonic growth establishes the

Answer 18

Foregut, Midgut, Hindgut, and Stomadeum

Question 19

______ separates the Foregut from Stomadeum

Answer 19

Buccopharyngeal membrane

Question 20

Endoderm derivatives include

Answer 20

Respiratory system
Liver
Pancreas
Thyroid

Question 21

Ectoderm derivatives include

Answer 21

Epidermis
Mammary Gland
Anterior Pituatary
Enamel

Question 22

Neuroectoderm will differentiate into

Answer 22

Ectomesenchyme