Question 1

Which statement is true regarding the yolk sac?

Accepted Answer

A) Only animals that develop outside the mother, like a chicken, have yolk sacs. 
B) The yolk sac in a human is inactive. 
C) The placenta and yolk sac are synonymous. 
D) The yolk sac will help to form the digestive system. 
A) Only animals that develop outside the mother, like a chicken, have yolk sacs. 
B) The yolk sac in a human is inactive. 
C) The placenta and yolk sac are synonymous. 
D) The yolk sac will help to form the digestive system.

Question 2

A "breech baby":

Accepted Answer

A) is when the baby is born before 37 weeks of gestation. 
B) is when the baby is delivered by cesarean section. 
C) is when the baby fails to gain weight like other babies its age. 
D) is when the baby's position in the womb makes it difficult to deliver because the buttocks or feet are lower than the head. 
A) is when the baby is born before 37 weeks of gestation. 
B) is when the baby is delivered by cesarean section. 
C) is when the baby fails to gain weight like other babies its age. 
D) is when the baby's position in the womb makes it difficult to deliver because the buttocks or feet are lower than the head.

Question 3

The amnion provides a diffusion area for the amniotic fluid.

Accepted Answer

A) True 
 B)False

Question 4

How many days old is this embryo?

Accepted Answer

A) 14 
B) 21 
C) 25 
D) 35 
A) 14 
B) 21 
C) 25 
D) 35

Question 5

Which hormone is responsible for positive readings in early pregnancy tests?

Accepted Answer

A) Human growth hormone 
B) Human chorionic gonadotropin 
C) Leutenizing hormone 
D) Estrogen 
A) Human growth hormone 
B) Human chorionic gonadotropin 
C) Leutenizing hormone 
D) Estrogen

Question 6

The fetal stage refers to the period immediately following birth.

Accepted Answer

A) True 
 B)False

Question 7

Quickening occurs during the?

Accepted Answer

A) Late embryonic stage 
B) First trimester 
C) Second trimester 
D) Third trimester 
A) Late embryonic stage 
B) First trimester 
C) Second trimester 
D) Third trimester

Question 8

Sperm must penetrate the _______________,the outer layer of the ovum,in order to fertilize it.

Accepted Answer

A) corona radiata 
B) trophoblast 
C) zona pellucida 
D) reticular layer 
A) corona radiata 
B) trophoblast 
C) zona pellucida 
D) reticular layer

Question 9

Identify the region indicated by the arrow.

Accepted Answer

A) Chorionic villi 
B) Amnion 
C) Allantosis 
D) Amniotic fluid 
A) Chorionic villi 
B) Amnion 
C) Allantosis 
D) Amniotic fluid

Question 10

The major hormone promoting the production of milk is:

Accepted Answer

A) oxytocin. 
B) estrogen. 
C) progesterone. 
D) prolactin. 
A) oxytocin. 
B) estrogen. 
C) progesterone. 
D) prolactin.

Question 11

How does a fetus obtain oxygen?

Accepted Answer

A) Fetal hemoglobin 'steals' oxygen from maternal hemoglobin at the placenta. 
B) Fetal lungs absorb oxygen from the amniotic fluid. 
C) Maternal blood mixes with fetal blood at the placenta. 
D) Fetal blood enters the maternal circulatory system and enters maternal lungs. 
A) Fetal hemoglobin 'steals' oxygen from maternal hemoglobin at the placenta. 
B) Fetal lungs absorb oxygen from the amniotic fluid. 
C) Maternal blood mixes with fetal blood at the placenta. 
D) Fetal blood enters the maternal circulatory system and enters maternal lungs.

Question 12

The epidermis of the skin comes from which embryonic layer?

Accepted Answer

A) Ectoderm 
B) Epiderm 
C) Endoderm 
D) Mesoderm 
A) Ectoderm 
B) Epiderm 
C) Endoderm 
D) Mesoderm

Question 13

Immediately after fertilization,paternal genes are being expressed due to the presence of the sperm whereas maternal genes are inactive at this point.

Accepted Answer

A) True 
 B)False

Question 14

Approximately how many days old is this group of cells?

Accepted Answer

A) 1 
B) 2 
C) 4 
D) 7 
A) 1 
B) 2 
C) 4 
D) 7

Question 15

The epidermis,nervous system,and adrenal medulla emerge from the:

Accepted Answer

A) endoderm. 
B) mesoderm. 
C) ectoderm. 
D) epithelium. 
A) endoderm. 
B) mesoderm. 
C) ectoderm. 
D) epithelium.

Question 16

What is labeled A in this diagram?

Accepted Answer

A) Endometrial gland 
B) Trophoblast 
C) Inner cell mass 
D) Blastocyst cavity 
A) Endometrial gland 
B) Trophoblast 
C) Inner cell mass 
D) Blastocyst cavity

Question 17

The placenta develops from the chorion,the outermost of the extraembryonic membranes.

Accepted Answer

A) True 
 B)False

Question 18

The second trimester sees the beginning of surfactant secretion,an important chemical that prevents the alveoli of the lungs from collapsing.

Accepted Answer

A) True 
 B)False

Question 19

When a sperm fertilizes an egg the resulting cell is called:

Accepted Answer

A) a morula. 
B) a blastocyst. 
C) an implantation. 
D) a zygote. 
A) a morula. 
B) a blastocyst. 
C) an implantation. 
D) a zygote.

Question 20

Once the baby's head pushes through the vagina,the body follows quickly.

Accepted Answer

A) True 
 B)False

Exam 19: Pregnancy: Development From Conception to Newborn

Which statement is true regarding the yolk sac?

A "breech baby":

The amnion provides a diffusion area for the amniotic fluid.

How many days old is this embryo?

Which hormone is responsible for positive readings in early pregnancy tests?

The fetal stage refers to the period immediately following birth.

Quickening occurs during the?

Sperm must penetrate the _______________,the outer layer of the ovum,in order to fertilize it.

Identify the region indicated by the arrow.

The major hormone promoting the production of milk is:

How does a fetus obtain oxygen?

The epidermis of the skin comes from which embryonic layer?

Immediately after fertilization,paternal genes are being expressed due to the presence of the sperm whereas maternal genes are inactive at this point.

Approximately how many days old is this group of cells?

The epidermis,nervous system,and adrenal medulla emerge from the:

What is labeled A in this diagram?

The placenta develops from the chorion,the outermost of the extraembryonic membranes.

The second trimester sees the beginning of surfactant secretion,an important chemical that prevents the alveoli of the lungs from collapsing.

When a sperm fertilizes an egg the resulting cell is called:

Once the baby's head pushes through the vagina,the body follows quickly.

What Is Life

Where Do We Come From and Where Do We Fit

Life Has a Unique Chemistry

Organization and Communication

Tissues

The Skeletomuscular System

The Nervous System

The Special Senses

Immunity and the Lymphatic System

Infectious Disease and Epidemiology

Cancer

The Cardiovascular System

The Respiratory System: Movement of Air

Nutrition: You Are What You Eat

The Digestive System

The Urinary System

The Endocrine System and Development

The Reproductive Systems: Maintaining the Species

Inheritance, Genetics, and Molecular Biology

Populations Evolve in Ecosystems

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