Chapter 29:Pregnancy

Question 1

When and where does fertilization occur?

Answer 1

Occurs within a day of ovulation in the fallopian tubes.

Question 2

How long does it take the sperm to make the trip and how do they move?

__-120 minutes. They move via muscular contractions and cilia.

Answer 2

30-120 minutes. They move via muscular contractions and cilia.

Question 3

What is covering the secondary oocyte?

Corona _______.
Follicular cells and protective layer.

Answer 3

radiata

Question 4

The ________ helps the sperm digest through the layer.

Process requires several sperm.

Answer 4

acrosome

Question 5

Intact sperm must contact the zone pellucidum layer to make contact with the ______.

Answer 5

oocyte

Question 6

What occurs after the fusion of the sperm and oocyte?

__________ of oocyte.
Na+ and Ca+ and completion of meiosis II.

Answer 6

Depolarization

Question 7

Why does the zone pellucidum harden after the oocyte and sperm are fused?

To _______ polyspermy

Answer 7

prevent

Question 8

First cleavage occurs thirty hours after fertilization. Yields __ daughter cells called blastomeres

Answer 8

2

Question 9

Occurs after first cleavage.

Answer 9

Blastocyst formation

Question 10

After the blastocyst formation the _______ continues to divide

Answer 10

Pre-embryo

Question 11

The pre embryo moves through the ______ via contractions and cilia

Answer 11

Fallopian tubes

Question 12

What day does the Pre-embryo arrive at the uterus??

Answer 12

4

Question 13

Solid ball of cells

Answer 13

Morula

Question 14

On day six a hollow ball is formed called

Answer 14

Blastocyst