QUIZ 3

Question 1

Cumulus cells

Answer 1

Cells surrounding and protecting the egg

Question 2

Collective endeavor

Answer 2

Multiple sperm required to pierce through cumulus cells

Question 3

Acrosome reaction

Answer 3

Sperm attaches to reinforced cover (zona pellucida)

Activated chemical drill to penetrate glycoproteins.

Question 4

Cortical reaction

Answer 4

Zona pellucida becomes impenetrable to prevent polyspermy

Question 5

Developmental steps (10)

Answer 5

Fertilization > zygote > 2 cell > 4 cell > 8 cell > 8 cell compacted morula > 16 cell morula > 32 cell morula > early blastocyst > late blastocyst

Question 6

Day 0
Day 3
Day 4
Day 8
Implantation range

Answer 6

Day 0 Amullary region
Day 3 development in fallopian
Day 4 enter uterus
Day 8 late blastocyst
Implantation range 6-14 days

Question 7

Implantation

Answer 7

8 days after conception

Question 8

Embryonic Period

Answer 8

8th week

When organogenesis is initiated

Question 9

Fetus

Answer 9

9-10 weeks

Organogenesis is complete including placenta

Question 10

Epitheliochorial placenta

Answer 10

(Hippos and pigs)

Layer of fetal tissue merely pressed close against the uterus wall

Question 11

Hemochorial

Answer 11

Maternal blood is in direct contact with the chorion