Ch 21: Online 1

Question 1

The embryonic period is the first ___ weeks of gestation

Answer 1

8 weeks

Question 2

What embryonic stage becomes implanted in the uterus?

Answer 2

Blastocyst

Question 3

What does the chorionic villi of the embryo become?

Answer 3

Placenta

Question 4

What is the embryonic disc?

Answer 4

Embryo in the blastocyst

Question 5

What does the umbilical cord contain?

Answer 5

One umbilical vein with oxygenated blood

Question 6

What hormone prevents premature contractions of the myometrium?

Answer 6

Progsterone

Question 7

In the fetal heart, blood flows from the right atrium to the left atrium through what?

Answer 7

Foramen ovale

Question 8

What happens during the first stage of labor?

Answer 8

The amniotic sac ruptures

Question 9

What happens during the third stage of labor?

Answer 9

The placenta is delivered

Question 10

What hormone promotes labor?

Answer 10

Oxytocin

Question 11

Mom and Dad are heterozygous for type A blood. A child has what chance of having type O?

Answer 11

25%

Question 12

Dad is homozygous for brown guys; Mom has blue eyes. A child has what change of having brown eyes?

Answer 12

100%

Question 13

Mom is color blind, and Dad is not. A son has what chance of being color blind?

Answer 13

100%

Question 14

Mom is color blind, and Dad is not. A daughter has what chance of being color blind?

Answer 14

zero - no chance at all