Question 1

Division of cells in a zygote is called

Accepted Answer

A)   induction.
B)   gastrulation.
C)   blastulation.
D)   cleavage.E) All of the above
F) None of the above

Question 2

Which of the following adult structures derives from neural crest?

Accepted Answer

A)   all bones
B)   all the pigment-producing cells in the body
C)   all the nerve cells in the spinal cord
D)   all the nerve cells in the brainE) None of the above
F) All of the above

Question 3

Defects in the development of the neural tube may be linked to inadequate dietary intake of .

Accepted Answer

The answer of Defects in the development of the neural...

Question 4

A(n) abortion is one in which the fetus dies and is naturally aborted.

Accepted Answer

The answer of A(n) abortion is one in which the...

Question 5

Figure 3.1
Use the diagram above to answer the following questions.
-Which letter indicates the uterus?

Accepted Answer

A)   A
B)   B
C)   C
D)   D
E)   EF) A) and B)
G) A) and E)

Question 6

The three primary germ layers are the endoderm, myotome, and exoderm.

Accepted Answer

A) True 
 B)False

Question 7

Mucus-producing glands of the respiratory tract arise from this layer.

Accepted Answer

A)   endoderm
B)   ectoderm
C)   mesoderm-somites
D)   mesoderm-lateral plate
E)   intermediate mesodermF) A) and B)
G) A) and C)

Question 8

What embryonic epiblast cells that remain on the surface of the trilaminar disc are ultimately called.

Accepted Answer

A)   endoderm
B)   ectoderm
C)   mesoderm-somites
D)   mesoderm-lateral plate
E)   intermediate mesodermF) A) and E)
G) None of the above

Question 9

The primary germ layer that ultimately forms the serous membranes of the peritoneum is

Accepted Answer

A)   ectoderm.
B)   neural crest.
C)   endoderm.
D)   mesoderm.E) None of the above
F) B) and C)

Question 10

The dermis of the dorsal body region is derived from somites. However, the dermis of the ventral body region is derived from

Accepted Answer

A)   endoderm.
B)   ectoderm.
C)   mesoderm-somites.
D)   mesoderm-lateral plate.
E)   intermediate mesoderm.F) C) and D)
G) B) and E)

Question 11

Another name for birth defect is

Accepted Answer

A)   congenital abnormality.
B)   birth illness.
C)   teratogenesis.
D)   prenatal pathology.E) B) and D)
F) A) and C)

Question 12

The most common cause of mental retardation in the United States is

Accepted Answer

A)   thalidomide.
B)   spina bifida.
C)   fetal alcohol syndrome.
D)   anencephaly.E) All of the above
F) None of the above

Question 13

This develops into the brain and spinal cord.

Accepted Answer

A)   endoderm
B)   ectoderm
C)   mesoderm-somites
D)   mesoderm-lateral plate
E)   intermediate mesodermF) All of the above
G) A) and B)

Question 14

Explain how conjoined twins may occur.

Accepted Answer

Conjoined twins result with th...

Question 15

Somatic mesoderm gives rise to all of the following except

Accepted Answer

A)   dermis of the skin of the belly.
B)   some serous membranes.
C)   epidermis of the upper limb.
D)   some bones.E) C) and D)
F) B) and C)

Question 16

Somites differentiate into

Accepted Answer

A)   the epidermis.
B)   the gastrointestinal lining.
C)   muscles.
D)   myotomes.E) A) and C)
F) A) and D)

Question 17

Male and female fetuses can first be distinguished by their genitalia at

Accepted Answer

A)   1 week.
B)   3 months.
C)   7 months.
D)   3 weeks.E) B) and D)
F) C) and D)

Question 18

This develops into the epidermis of the skin.

Accepted Answer

A)   endoderm
B)   ectoderm
C)   mesoderm-somites
D)   mesoderm-lateral plate
E)   intermediate mesodermF) A) and B)
G) C) and D)

Question 19

The middlemost embryonic germ layer to develop is

Accepted Answer

A)   mesoderm.
B)   protoderm.
C)   ectoderm.
D)   endoderm.E) C) and D)
F) All of the above

Question 20

The sex of the fetus can be determined externally by approximately month .

Accepted Answer

The answer of The sex of the fetus can be...

Exam 3: Basic Embryology

Division of cells in a zygote is called

Correct AnswerverifiedShow Answer

Which of the following adult structures derives from neural crest?

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Defects in the development of the neural tube may be linked to inadequate dietary intake of .

Correct AnswerverifiedShow Answer

This develops into the brain and spinal cord.

Correct AnswerverifiedShow Answer

Another name for birth defect is

Correct AnswerverifiedShow Answer

The middlemost embryonic germ layer to develop is

Correct AnswerverifiedShow Answer

A(n) abortion is one in which the fetus dies and is naturally aborted.

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Male and female fetuses can first be distinguished by their genitalia at

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Somites differentiate into

Correct AnswerverifiedShow Answer

Mucus-producing glands of the respiratory tract arise from this layer.

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This develops into the epidermis of the skin.

Correct AnswerverifiedShow Answer

Somatic mesoderm gives rise to all of the following except

Correct AnswerverifiedShow Answer

What embryonic epiblast cells that remain on the surface of the trilaminar disc are ultimately called.

Correct AnswerverifiedShow Answer

The three primary germ layers are the endoderm, myotome, and exoderm.

Correct AnswerverifiedShow Answer

The most common cause of mental retardation in the United States is

Correct AnswerverifiedShow Answer

The primary germ layer that ultimately forms the serous membranes of the peritoneum is

Correct AnswerverifiedShow Answer

The dermis of the dorsal body region is derived from somites. However, the dermis of the ventral body region is derived from

Correct AnswerverifiedShow Answer

The sex of the fetus can be determined externally by approximately month .

Correct AnswerverifiedShow Answer

Figure 3.1 Use the diagram above to answer the following questions. -Which letter indicates the uterus?

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Explain how conjoined twins may occur.

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Conjoined twins result with th...
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