Question 1

For fertilization to occur,many sperm are needed to

Accepted Answer

A)  break down the cell membrane of the oocyte 
B)  activate the polar bodies 
C)  stimulate the final division of the oocyte 
D)  separate the cells of the corona radiata so a single sperm can enter 
E)  destroy the polar bodies so they don't use nutrients

Question 2

The extraembryonic membrane that surrounds the embryo and secretes a fluid that cushions it is the

Accepted Answer

A)  allantois 
B)  amnion 
C)  chorion 
D)  yolk sac 
E)  placenta

Question 3

Fertilization usually takes place in the

Accepted Answer

A)  uterus 
B)  uterine tube 
C)  vagina 
D)  cervix 
E)  fornix

Question 4

Milk is not produced unless prolactin is stimulated by a baby's suckling.

Accepted Answer

A) True 
 B)False

Question 5

What is the term for the postnatal period that begins at birth and lasts about 4 weeks?

Accepted Answer

The answer of What is the term for the postnatal...

Question 6

The expulsion stage of labor generally lasts for 3-4 hours.

Accepted Answer

A) True 
 B)False

Question 7

The longest period in prenatal development is the _____ period.

Accepted Answer

A)  embryonic 
B)  pre-embryonic 
C)  fetal 
D)  fertilization

Question 8

The extraembryonic membrane that contributes to the formation of umbilical blood vessels is the

Accepted Answer

A)  allantois 
B)  amnion 
C)  chorion 
D)  yolk sac 
E)  placenta

Question 9

Near the end of gestation,the inhibition of uterine muscle contractions is removed by _____ levels of _____.

Accepted Answer

A)  increasing; progesterone 
B)  decreasing; progesterone 
C)  increasing; estrogen 
D)  decreasing; estrogen 
E)  increasing; oxytocin

Question 10

The ectoderm,mesoderm,and endoderm develop during the first two weeks after fertilization.

Accepted Answer

A) True 
 B)False

Question 11

Near the end of gestation,uterine muscles become sensitized for contractions by _____ levels of _____.

Accepted Answer

A)  increasing; progesterone 
B)  decreasing; progesterone 
C)  increasing; estrogen 
D)  decreasing; estrogen 
E)  increasing; oxytocin

Question 12

The cells around the periphery of a blastocyst form the

Accepted Answer

A)  inner cell mass 
B)  trophoblast 
C)  blastocele 
D)  chorion 
E)  amnion

Question 13

What is the term for the extraembryonic membrane that contributes to the formation of the placenta?

Accepted Answer

The answer of What is the term for the extraembryonic...

Question 14

What is the term for the region where fertilization generally occurs?

Accepted Answer

The answer of What is the term for the region...

Question 15

The relationship of the hypothalamus,oxytocin,and uterine contractions is an example of a _____ feedback mechanism.

Accepted Answer

A)  negative 
B)  positive

Question 16

The embryonic period lasts for about six months.

Accepted Answer

A) True 
 B)False

Question 17

The vessel that carries oxygenated blood from the placenta to the fetus is the

Accepted Answer

A)  umbilical artery 
B)  umbilical vein 
C)  ductus venosus 
D)  placental artery 
E)  placental vein

Question 18

Labor is the

Accepted Answer

A)  same as parturition 
B)  process by which forceful contractions expel the fetus from the uterus 
C)  term used to refer to the birth of a baby 
D)  final stage in the birth of a baby

Question 19

With prostaglandins,what is the hormone that stimulates uterine contractions?

Accepted Answer

The answer of With prostaglandins,what is the hormone that stimulates...

Question 20

The term gestation refers to the

Accepted Answer

A)  period from conception to parturition 
B)  embryonic period 
C)  fetal period 
D)  period two weeks before birth to two weeks after birth

Exam 20: Development

For fertilization to occur,many sperm are needed to

The extraembryonic membrane that surrounds the embryo and secretes a fluid that cushions it is the

Fertilization usually takes place in the

Milk is not produced unless prolactin is stimulated by a baby's suckling.

What is the term for the postnatal period that begins at birth and lasts about 4 weeks?

The expulsion stage of labor generally lasts for 3-4 hours.

The longest period in prenatal development is the _____ period.

The extraembryonic membrane that contributes to the formation of umbilical blood vessels is the

Near the end of gestation,the inhibition of uterine muscle contractions is removed by _ levels of _.

The ectoderm,mesoderm,and endoderm develop during the first two weeks after fertilization.

Near the end of gestation,uterine muscles become sensitized for contractions by _ levels of _.

The cells around the periphery of a blastocyst form the

What is the term for the extraembryonic membrane that contributes to the formation of the placenta?

What is the term for the region where fertilization generally occurs?

The relationship of the hypothalamus,oxytocin,and uterine contractions is an example of a _____ feedback mechanism.

The embryonic period lasts for about six months.

The vessel that carries oxygenated blood from the placenta to the fetus is the

Labor is the

With prostaglandins,what is the hormone that stimulates uterine contractions?

The term gestation refers to the