Question 1

By the end of the first week of prenatal development,the blastula stops traveling and undergoes:

Accepted Answer

A)  implantation. 
B)  migration. 
C)  disintegration. 
D)  amniocentesis. 
A)  implantation. 
B)  migration. 
C)  disintegration. 
D)  amniocentesis. A

Question 2

Which of the following can occur that mainly involves the abnormal development of one or more structures from ectoderm within the embryonic period?

Accepted Answer

A)  Treacher Collins syndrome 
B)  Ectodermal dysplasia 
C)  Congenital syphilis 
D)  Fetal alcohol syndrome 
A)  Treacher Collins syndrome 
B)  Ectodermal dysplasia 
C)  Congenital syphilis 
D)  Fetal alcohol syndrome B

Question 3

Which of the following statements concerning prenatal development is correct?

Accepted Answer

A)  Most congenital malformations occur during the last prenatal week. 
B)  Maturation of existing structures occurs during the second to eighth week. 
C)  Initiation of embryonic layers occurs during the first week. 
D)  The fetus is the structure present during the embryonic period. 
A)  Most congenital malformations occur during the last prenatal week. 
B)  Maturation of existing structures occurs during the second to eighth week. 
C)  Initiation of embryonic layers occurs during the first week. 
D)  The fetus is the structure present during the embryonic period. C

Question 4

Which period of prenatal development is characterized by increased cellular differentiation?

Accepted Answer

A)  Unattached conceptus 
B)  Embryonic period 
C)  Preimplantation period 
D)  Fetal period 
A)  Unattached conceptus 
B)  Embryonic period 
C)  Preimplantation period 
D)  Fetal period

Question 5

In which of the following do the final stages of meiosis occur during prenatal development?

Accepted Answer

A)  Placenta 
B)  Ovum 
C)  Sperm 
D)  Yolk sac 
A)  Placenta 
B)  Ovum 
C)  Sperm 
D)  Yolk sac

Question 6

During which week of prenatal development does the neural plate differentiate?

Accepted Answer

A)  Second week 
B)  Third week 
C)  Fourth week 
D)  Fifth week 
A)  Second week 
B)  Third week 
C)  Fourth week 
D)  Fifth week

Question 7

During prenatal development,the oropharyngeal membrane of the embryo:

Accepted Answer

A)  consists of three embryonic layers. 
B)  is located superior to the first branchial arch. 
C)  disintegrates during the third week of prenatal development. 
D)  is located superior to the maxillary process. 
A)  consists of three embryonic layers. 
B)  is located superior to the first branchial arch. 
C)  disintegrates during the third week of prenatal development. 
D)  is located superior to the maxillary process.

Question 8

Found in early prenatal development,the neural tube will form in the future which of the following structures?

Accepted Answer

A)  Heart 
B)  Spinal cord 
C)  Face 
D)  Digestive tract 
A)  Heart 
B)  Spinal cord 
C)  Face 
D)  Digestive tract

Question 9

Which of the following structures initially forms during the third week of prenatal development?

Accepted Answer

A)  Primitive streak 
B)  Embryoblast layer 
C)  Bilaminar embryonic disc 
D)  Trophoblast layer 
A)  Primitive streak 
B)  Embryoblast layer 
C)  Bilaminar embryonic disc 
D)  Trophoblast layer

Question 10

What exact cells or structures develop from neuroectoderm and migrate from the neural folds to then join mesoderm to form mesenchyme during the third week of prenatal development?

Accepted Answer

A)  Somites 
B)  Neural crest cells 
C)  Mesoderm 
D)  Yolk sac 
A)  Somites 
B)  Neural crest cells 
C)  Mesoderm 
D)  Yolk sac

Question 11

The folding of the embryo during prenatal development causes _____ to be on the _____.

Accepted Answer

A)  endoderm; inside of the embryo 
B)  ectoderm; inside of endoderm 
C)  endoderm; outside of the mesoderm 
D)  mesoderm; outside of the ectoderm 
A)  endoderm; inside of the embryo 
B)  ectoderm; inside of endoderm 
C)  endoderm; outside of the mesoderm 
D)  mesoderm; outside of the ectoderm

Question 12

From which embryonic layer is mesoderm derived during prenatal development?

Accepted Answer

A)  Epiblast layer 
B)  Hypoblast layer 
C)  Endoderm 
D)  Neuroectoderm 
A)  Epiblast layer 
B)  Hypoblast layer 
C)  Endoderm 
D)  Neuroectoderm

Question 13

How many X-type chromosomes are necessary for the embryo to become of the female gender when present during prenatal development?

Accepted Answer

A)  One 
B)  Two 
C)  Three 
D)  Four 
A)  One 
B)  Two 
C)  Three 
D)  Four

Question 14

How many pairs of somites form the cuboidal segments of mesoderm within the embryo during the third week of prenatal development?

Accepted Answer

A)  12 
B)  18 
C)  38 
D)  42 
A)  12 
B)  18 
C)  38 
D)  42

Question 15

If there is failure of migration of the neural crest cells to the facial region during prenatal development,_____ can develop in the embryo.

Accepted Answer

A)  ectodermal dysplasia 
B)  fetal alcohol syndrome 
C)  Down syndrome 
D)  Treacher Collins syndrome 
A)  ectodermal dysplasia 
B)  fetal alcohol syndrome 
C)  Down syndrome 
D)  Treacher Collins syndrome

Question 16

What exact cells are localized to the neural plate of the embryo during the third week of prenatal development?

Accepted Answer

A)  Neuroectoderm 
B)  Mesenchyme 
C)  Somites 
D)  Endoderm 
A)  Neuroectoderm 
B)  Mesenchyme 
C)  Somites 
D)  Endoderm

Question 17

The neural crest cells migrate from which embryonic structures during prenatal development?

Accepted Answer

A)  Stomodeum 
B)  First branchial arch 
C)  Neural folds 
D)  Frontonasal process 
A)  Stomodeum 
B)  First branchial arch 
C)  Neural folds 
D)  Frontonasal process

Question 18

What best characterizes the first week of prenatal development so that the blastocyst splits into smaller and more numerous cells?

Accepted Answer

A)  Implantation 
B)  Mitotic cleavage 
C)  Meiosis 
D)  Fertilization 
A)  Implantation 
B)  Mitotic cleavage 
C)  Meiosis 
D)  Fertilization

Question 19

When does the blastocyte stop traveling and undergo implantation during prenatal development?

Accepted Answer

A)  First week 
B)  Second week 
C)  Third week 
D)  Fourth week 
A)  First week 
B)  Second week 
C)  Third week 
D)  Fourth week

Question 20

What is the prenatal organ that joins the pregnant woman and the developing embryo during the second week of prenatal development?

Accepted Answer

A)  Placenta 
B)  Amniotic cavity 
C)  Yolk sac 
D)  Primitive streak 
A)  Placenta 
B)  Amniotic cavity 
C)  Yolk sac 
D)  Primitive streak

By the end of the first week of prenatal development,the blastula stops traveling and undergoes:

Which of the following can occur that mainly involves the abnormal development of one or more structures from ectoderm within the embryonic period?

Which of the following statements concerning prenatal development is correct?

Which period of prenatal development is characterized by increased cellular differentiation?

In which of the following do the final stages of meiosis occur during prenatal development?

During which week of prenatal development does the neural plate differentiate?

During prenatal development,the oropharyngeal membrane of the embryo:

Found in early prenatal development,the neural tube will form in the future which of the following structures?

Which of the following structures initially forms during the third week of prenatal development?

What exact cells or structures develop from neuroectoderm and migrate from the neural folds to then join mesoderm to form mesenchyme during the third week of prenatal development?

The folding of the embryo during prenatal development causes _ to be on the _.

From which embryonic layer is mesoderm derived during prenatal development?

How many X-type chromosomes are necessary for the embryo to become of the female gender when present during prenatal development?

How many pairs of somites form the cuboidal segments of mesoderm within the embryo during the third week of prenatal development?

If there is failure of migration of the neural crest cells to the facial region during prenatal development,_____ can develop in the embryo.

What exact cells are localized to the neural plate of the embryo during the third week of prenatal development?

The neural crest cells migrate from which embryonic structures during prenatal development?

What best characterizes the first week of prenatal development so that the blastocyst splits into smaller and more numerous cells?

When does the blastocyte stop traveling and undergo implantation during prenatal development?

What is the prenatal organ that joins the pregnant woman and the developing embryo during the second week of prenatal development?

Face and Neck Regions

Oral Cavity and Pharynx

Face and Neck Development

Orofacial Development

Tooth Development and Eruption

Cells

Basic Tissue

Oral Mucosa

Gingival and Dentogingival Junctional Tissue

Head and Neck Structures

Enamel

Dentin and Pulp

Periodontium: Cementum, Alveolar Process, and Periodontal Ligament

Overview of Dentitions

Permanent Anterior Teeth

Permanent Posterior Teeth

Primary Dentition

Temporomandibular Joint

Occlusion

Filters

Exam 3: Prenatal Development

By the end of the first week of prenatal development,the blastula stops traveling and undergoes:

Which of the following can occur that mainly involves the abnormal development of one or more structures from ectoderm within the embryonic period?

Which of the following statements concerning prenatal development is correct?

Which period of prenatal development is characterized by increased cellular differentiation?

In which of the following do the final stages of meiosis occur during prenatal development?

During which week of prenatal development does the neural plate differentiate?

During prenatal development,the oropharyngeal membrane of the embryo:

Found in early prenatal development,the neural tube will form in the future which of the following structures?

Which of the following structures initially forms during the third week of prenatal development?

What exact cells or structures develop from neuroectoderm and migrate from the neural folds to then join mesoderm to form mesenchyme during the third week of prenatal development?

The folding of the embryo during prenatal development causes _____ to be on the _____.

From which embryonic layer is mesoderm derived during prenatal development?

How many X-type chromosomes are necessary for the embryo to become of the female gender when present during prenatal development?

How many pairs of somites form the cuboidal segments of mesoderm within the embryo during the third week of prenatal development?

If there is failure of migration of the neural crest cells to the facial region during prenatal development,_____ can develop in the embryo.

What exact cells are localized to the neural plate of the embryo during the third week of prenatal development?

The neural crest cells migrate from which embryonic structures during prenatal development?

What best characterizes the first week of prenatal development so that the blastocyst splits into smaller and more numerous cells?

When does the blastocyte stop traveling and undergo implantation during prenatal development?

What is the prenatal organ that joins the pregnant woman and the developing embryo during the second week of prenatal development?

Face and Neck Regions

Oral Cavity and Pharynx

Face and Neck Development

Orofacial Development

Tooth Development and Eruption

Cells

Basic Tissue

Oral Mucosa

Gingival and Dentogingival Junctional Tissue

Head and Neck Structures

Enamel

Dentin and Pulp

Periodontium: Cementum, Alveolar Process, and Periodontal Ligament

Overview of Dentitions

Permanent Anterior Teeth

Permanent Posterior Teeth

Primary Dentition

Temporomandibular Joint

Occlusion

Filters

The folding of the embryo during prenatal development causes _ to be on the _.