2-18-17

Question 1

it’s not birth, marriage, or death, but _______ which is truly the most important moment of your life

Answer 1

gastrulation

Question 2

skin and nervous - formed during gastrulation

Answer 2

ectoderm

Question 3

respiratory and digestive - formed in gastrulation

Answer 3

endoderm

Question 4

connective tisseu, blood, heart - formed during gastrulation

Answer 4

mesoderm

Question 5

week one embryonic development events

Answer 5

fertilization, morula, blastocycst, implantation

Question 6

polyspermy-

Answer 6

multiple sperm

Question 7

zona pellucida

Answer 7

translucent layer around Oocyte, sperm attachment site, protects zygote, implantation to the uterus

Question 8

Oocyte

Answer 8

egg+sperm??

Question 9

acrosomal vesicle was originally derived from______

Answer 9

golgi

Question 10

how does one sperm recognize an Oocyte

Answer 10

specific receptor on head of sperm that recognize zona pellicula

Question 11

how is polyspermy prevented

Answer 11

binding increases opening of sodium channels and release of cortical granules

Question 12

activation of sperm

Answer 12

exocytosis of the acrosomal vesicle (containing proteases)

Question 13

4 key steps of fertilization

Answer 13

1. binding of sperm 2. acrosomal reaction 3. penetration through zona pellucida 4. fusion of plasma membranes 5 sperm nucleaus enters egg cytoplasm.

Question 14

cleavage begins about ______ hours post fertilization

Answer 14

30

Question 15

blastomeres are ________

Answer 15

totipotent

Question 16

cleavage leads to _______of the ________

Answer 16

compaction , morula

Question 17

the morula is tightly adhered within the ________ __________

Answer 17

zona pellucida

Question 18

blastomere is _____ the blastula

Answer 18

before

Question 19

how many cells in a blastomere?

Answer 19

1

Question 20

totipotency synonym

Answer 20

multipotency

Question 21

the first cell differentiation event takes place in the __________

Answer 21

blastocyst

Question 22

parts of a blastocyst

Answer 22

blastocoel, zona pellucida, inner cell mass, trophoblast

Question 23

what portion of the blastocyst forms the embryo?

Answer 23

the inner cell mass

Question 24

Oct4 protein is expressed in the _______ cells of the __________

Answer 24

pluripotent ICM

Question 25

totipotent

Answer 25

can give rise to any other cell in the body

Question 26

pluripotent

Answer 26

can give rise to more than one other cell in the body

Question 27

you can make a cell pluripotent by the introduction of _____ _________

Answer 27

transcription factors

Question 28

we all _____ as embryos

Answer 28

hatch

Question 29

we hatch from the _____ ______

Answer 29

zona pellucida

Question 30

the chorion enables_______

Answer 30

the fetus to get oxegen and nutrients from the mother

Question 31

syntrhophoblast

Answer 31

multiple nuclei and ……

Question 32

3 types of monozygotic twins

Answer 32

unique chorion, shared chorion- ok, shared chorion-possible conjoined

Question 33

cyncytiotrophoblast

Answer 33

intermediary trophoblast with finger like projections

Question 34

ICM’s form originally into a _____ _______

Answer 34

bilaminar disc

Question 35

epiblast

Answer 35

part of the bilaminar disc

Question 36

hypoblast cells

Answer 36

part of the bilaminar disc

Question 37

connecting stalk connects to the _______

Answer 37

umbilical cord

Question 38

the hypoblast is pushed away to form the ______

Answer 38

endoderm

Question 39

top down order of first layers

Answer 39

ecto, meso, endoderm

Question 40

almost 2/3 of fertilized embyos ______

Answer 40

terminate

Question 41

how do you go from a sheet of cells into something as complex as a brain?

Answer 41

shaping, folding, closure

Question 42

MHP

Answer 42

medial hinge points

Question 43

folic acid supplements can prevent what?

Answer 43

50% of neural closure defects