Question 1

Implantation typically occurs approximately

Accepted Answer

A)   3 days after fertilization.
B)   2 days after fertilization.
C)   6 days after fertilization.
D)   10 days after fertilization. C

Question 2

A fertilized egg is called a ____________________.

Accepted Answer

zygote

Question 3

Most of the organs are developed during which stage of pregnancy?

Accepted Answer

A)   First trimester
B)   Second trimester
C)   The last week of the first trimester
D)   Third trimester B

Question 4

The stage of development that begins at fertilization and lasts for 16 days is called the

Accepted Answer

A)   fetal stage.
B)   zygotic stage.
C)   embryonic stage.
D)   pre-embryonic stage.

Question 5

Which portion of the blastocyst fuses with the endometrium?

Accepted Answer

A)   Trophoblast
B)   Embryonic disc
C)   Yolk sac
D)   Ectoderm

Question 6

When does the fetal heart begin to beat?

Accepted Answer

A)   Day 12
B)   Day 22
C)   8 weeks
D)   20 weeks

Question 7

Gestation typically lasts about

Accepted Answer

A)   40 weeks.
B)   42 weeks.
C)   39 weeks.
D)   38 weeks.

Question 8

The stage of development that begins the eighth week and lasts until birth is called the ____________________ stage.

Accepted Answer

The answer of The stage of development that begins the...

Question 9

The stage of development that begins the third week of gestation and lasts until the eighth week is called the ____________________ stage.

Accepted Answer

The answer of The stage of development that begins the...

Question 10

Which extraembryonic membrane eventually forms the fetal side of the placenta?

Accepted Answer

A)   Amnion
B)   Chorion
C)   Allantois
D)   Yolk sac

Question 11

The second stage of labor ends when

Accepted Answer

A)   the membranes rupture.
B)   the cervix is fully effaced.
C)   the baby is born.
D)   the placenta is delivered.

Question 12

Which extraembryonic membrane serves as the foundation for the umbilical cord?

Accepted Answer

A)   Amnion
B)   Chorion
C)   Allantois
D)   Yolk sac

Question 13

A woman giving birth for the first time is called a ____________________.

Accepted Answer

The answer of A woman giving birth for the first...

Question 14

The fine hair covering the fetus's body is called ____________________.

Accepted Answer

The answer of The fine hair covering the fetus's body...

Question 15

If the ductus arteriosus fails to close at birth, what symptoms would you expect to see and why?

Accepted Answer

A)   Respiratory difficulty, because blood is bypassing the lungs
B)   Increased levels of toxins in the blood, because blood is bypassing the liver
C)   Decreased urine output, because blood is bypassing the kidneys
D)   Decreased nutrition, because blood is bypassing the stomach

Question 16

The umbilical cord contains

Accepted Answer

A)   two umbilical arteries and one umbilical vein.
B)   two umbilical arteries and two umbilical veins.
C)   one umbilical artery and one umbilical vein.
D)   one umbilical artery and two umbilical veins.

Question 17

How many chromosomes does a zygote have?

Accepted Answer

A)   46
B)   46 pairs
C)   23
D)   12

Question 18

What role is served by the ductus venosus?

Accepted Answer

A)   It shunts blood from the right into the left atrium.
B)   It shunts blood around the liver.
C)   It shunts blood from the right ventricle to the pulmonary artery.
D)   It shunts blood around the kidneys.

Question 19

Which of the following is one of the factors thought to contribute to the onset of labor?

Accepted Answer

A)   An increase in progesterone
B)   A decline in estrogen
C)   The release of oxytocin
D)   Fetal movement

Question 20

Shortly after fertilization, the fertilized cell divides by ____________________, a process called ____________________, to produce two identical daughter cells.

Accepted Answer

The answer of Shortly after fertilization, the fertilized cell divides...

Exam 24: Pregnancy Human Development