NBDHE Darby and Walsh 9th Edition Comprehensive Review Test Bank
NBDHE DARBY AND WALSH 9TH EDITION COMPREHENSIVE
REVIEW TEST BANK NEWEST 2026/2027 ACTUAL EXAM
COMPLETE 400 QUESTIONS AND CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) |ALREADY GRADED A+||BRAND NEW
VERSION!!
A cleft lip occurs when the maxillary process fails to fuse with which one of the
following embryonic processes?
a. Palatine process
b. Globular process (medial nasal process)
c. Lateral nasal process
d. Mandibular process
e. Opposing maxillary process - Correct Answer-B. Cleft lip occurs when the
maxillary process fails to fuse with the globular process. The maxillary process
forms the sides of the lip, and the globular process (medial nasal process) forms
the center or philtrum of the lip. A cleft lip can occur on one side (e.g., the right
maxillary process fails to fuse with the globular process), or on both sides (e.g.,
the right and left maxillary processes fail to fuse with the globular process).
Embryonically, the mandible is derived from the:
a. Stomodeum
b. First branchial arch
c. Frontal process
d. Second branchial arch
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, NBDHE Darby and Walsh 9th Edition Comprehensive Review Test Bank
e. Third branchial arch - Correct Answer-B. The first branchial arch gives rise to a
large portion of the face and the intraoral structures. The mandible is derived
from the first branchial arch.
The anterior portion, or body, of the tongue develops from the:
a. Second branchial arch
b. Maxillary process
c. Mandibular process
d. Globular process (medial nasal process)
e. Rathke's pouch - Correct Answer-C. The mandibular process gives rise to the
body of the tongue. Maxillary processes arise from the superolateral border of the
first branchial arch. Once this occurs, the rest of the first branchial arch is referred
to as the mandibular process. From the mandibular process (first branchial arch),
two lateral swellings and one medial swelling (tuberculum impar) merge to form
the body of the tongue.
Which of the following orofacial structures is located in the midline of the face or
neck?
a. Philtrum
b. Submandibular salivary gland
c. Naris and ala
d. Parotid salivary gland - Correct Answer-A. The nasal septum is a vertical groove
on the midline of the upper lip
Continuous replacement of cells is characteristic of which type of epithelium?
a. Simple squamous
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, NBDHE Darby and Walsh 9th Edition Comprehensive Review Test Bank
b. Stratified squamous
c. Pseudo-stratified columnar
d. Stratified transitional - Correct Answer-B. Continuous replace of cells is a
characteristic of stratified squamous epithelium. The cells of the basal layer
constantly under mitosis, and the surface cells slough off as new cells move to the
surface.
When a cleft of the alveolar process is present, it occurs between the
a. First and second premolars
b. Central incisors
c. Lateral incisor and canine
d. Canine and first premolar - Correct Answer-C. A cleft of the alveolar ridge
results from the lack of fusion of the premaxilla, which forms the anterior portion
of the palate and gives rise to the maxillary incisors, and of the lateral palatine
processes (palatal shelves), which give rise to the posterior two thirds of the hard
palate and contain the maxillary canines and posterior teeth. The lines of fusion,
therefore, fall between the laterals and the canine teeth.
The overlapping period between the primary and permanent dentition is
considered the period of:
a. Primary
b. Secondary
c. Tertiary
d. Mixed - Correct Answer-D. A mixed dentition is one with primary and secondary
teeth
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, NBDHE Darby and Walsh 9th Edition Comprehensive Review Test Bank
During the cell cycle, interphase involves the cells engaging in:
a. Chromatin removal
b. Organelle replication
c. Centromere reduction
d. Substance destruction - Correct Answer-B. within interphase engage in growth,
metabolism, organelle replacement, and substance production, including
chromatin and centrosome replication.
Meckel's cartilage is derived from neural crest cells which migrate cephalad and
interact with cephalic ectoderm and mesoderm to result in the development of:
a. Facial skeleton
b. Neck Skeleton
c. Connective tissue components
d. Tooth development - Correct Answer-A. Facial skeleton is derived from Meckel's
cartilage
Each germ cell contains ____ chromosomes (haploid number); during the process
of fertilization, the number is restored to ____ chromosomes (diploid).
a. 22, 45
b. 21, 44
c. 20, 43
d. 23, 46 - Correct Answer-D. 23, 46 haploid and diploid numbers
Each tooth is the product of two tissues that interact during tooth development:
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NBDHE DARBY AND WALSH 9TH EDITION COMPREHENSIVE
REVIEW TEST BANK NEWEST 2026/2027 ACTUAL EXAM
COMPLETE 400 QUESTIONS AND CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) |ALREADY GRADED A+||BRAND NEW
VERSION!!
A cleft lip occurs when the maxillary process fails to fuse with which one of the
following embryonic processes?
a. Palatine process
b. Globular process (medial nasal process)
c. Lateral nasal process
d. Mandibular process
e. Opposing maxillary process - Correct Answer-B. Cleft lip occurs when the
maxillary process fails to fuse with the globular process. The maxillary process
forms the sides of the lip, and the globular process (medial nasal process) forms
the center or philtrum of the lip. A cleft lip can occur on one side (e.g., the right
maxillary process fails to fuse with the globular process), or on both sides (e.g.,
the right and left maxillary processes fail to fuse with the globular process).
Embryonically, the mandible is derived from the:
a. Stomodeum
b. First branchial arch
c. Frontal process
d. Second branchial arch
1|Page
, NBDHE Darby and Walsh 9th Edition Comprehensive Review Test Bank
e. Third branchial arch - Correct Answer-B. The first branchial arch gives rise to a
large portion of the face and the intraoral structures. The mandible is derived
from the first branchial arch.
The anterior portion, or body, of the tongue develops from the:
a. Second branchial arch
b. Maxillary process
c. Mandibular process
d. Globular process (medial nasal process)
e. Rathke's pouch - Correct Answer-C. The mandibular process gives rise to the
body of the tongue. Maxillary processes arise from the superolateral border of the
first branchial arch. Once this occurs, the rest of the first branchial arch is referred
to as the mandibular process. From the mandibular process (first branchial arch),
two lateral swellings and one medial swelling (tuberculum impar) merge to form
the body of the tongue.
Which of the following orofacial structures is located in the midline of the face or
neck?
a. Philtrum
b. Submandibular salivary gland
c. Naris and ala
d. Parotid salivary gland - Correct Answer-A. The nasal septum is a vertical groove
on the midline of the upper lip
Continuous replacement of cells is characteristic of which type of epithelium?
a. Simple squamous
2|Page
, NBDHE Darby and Walsh 9th Edition Comprehensive Review Test Bank
b. Stratified squamous
c. Pseudo-stratified columnar
d. Stratified transitional - Correct Answer-B. Continuous replace of cells is a
characteristic of stratified squamous epithelium. The cells of the basal layer
constantly under mitosis, and the surface cells slough off as new cells move to the
surface.
When a cleft of the alveolar process is present, it occurs between the
a. First and second premolars
b. Central incisors
c. Lateral incisor and canine
d. Canine and first premolar - Correct Answer-C. A cleft of the alveolar ridge
results from the lack of fusion of the premaxilla, which forms the anterior portion
of the palate and gives rise to the maxillary incisors, and of the lateral palatine
processes (palatal shelves), which give rise to the posterior two thirds of the hard
palate and contain the maxillary canines and posterior teeth. The lines of fusion,
therefore, fall between the laterals and the canine teeth.
The overlapping period between the primary and permanent dentition is
considered the period of:
a. Primary
b. Secondary
c. Tertiary
d. Mixed - Correct Answer-D. A mixed dentition is one with primary and secondary
teeth
3|Page
, NBDHE Darby and Walsh 9th Edition Comprehensive Review Test Bank
During the cell cycle, interphase involves the cells engaging in:
a. Chromatin removal
b. Organelle replication
c. Centromere reduction
d. Substance destruction - Correct Answer-B. within interphase engage in growth,
metabolism, organelle replacement, and substance production, including
chromatin and centrosome replication.
Meckel's cartilage is derived from neural crest cells which migrate cephalad and
interact with cephalic ectoderm and mesoderm to result in the development of:
a. Facial skeleton
b. Neck Skeleton
c. Connective tissue components
d. Tooth development - Correct Answer-A. Facial skeleton is derived from Meckel's
cartilage
Each germ cell contains ____ chromosomes (haploid number); during the process
of fertilization, the number is restored to ____ chromosomes (diploid).
a. 22, 45
b. 21, 44
c. 20, 43
d. 23, 46 - Correct Answer-D. 23, 46 haploid and diploid numbers
Each tooth is the product of two tissues that interact during tooth development:
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