NBDHE PRACTICE TEST SET COMPLETE
STUDY GUIDE 2026 | MOCK EXAM
QUESTIONS, RATIONALES & CHEAT SHEET
| GRADED A+ | GUARANTEED SUCCESS
Updated 2026 Questions and Answers
100% Verified Exam Prep and Comprehensive
Rationales Included
,The surface of the condyle articulates with the D. temporal bone
A. external acoustic meatus.
B. styloid process. RATIONALE: The condyle articulates with temporal bone, forming the moving part
C. coronoid notch. of the TMJ. The external acoustic meatus is the ear canal and does not rotate
D. temporal bone. within the condyle. The styloid process, a pointed piece of bone extending below
the ear, projects down and forward from the inferior surface of the temporal
bone. The coronoid notch, also called the coronoid process, is a concavity on the
anterior border of the ramus of the mandible.
A structure in the cell that contains a single, circular DNA, A. mitochondria
and synthesizes adenosine triphosphate (ATP) is the
A. mitochondria. RATIONALE: Mitochondria are powerful cellular organelles that contain a single
B. lysosome. circular DNA, and synthesize the body's primary source of energy, adenosine
C. endoplasmic reticulum. triphosphate (ATP). Lysosomes contain digestive enzymes and lead the
D. Golgi apparatus. breakdown of foreign substances by the process of phagocytosis. Endoplasmic
reticulum is involved in protein synthesis and the transport of nutrients to the
nucleus. The golgi apparatus stores, packs, and transfers proteins and other
cellular components to the exterior of a secretory cell.
Which tooth is known for its bifurcated root? D. maxillary first premolar
A. Mandibular second premolar
B. Maxillary second premolar RATIONALE: In about 60% of maxillary 1st premolars a bifurcation occurs in the
C. Maxillary first premolar apical third to half of the root. This bifurcation forms one facial and one lingual
D. Mandibular first premolar root. The mandibular second premolar, the maxillary second premolar, and the
mandibular first premolar each have only one root.
Which of the following permanent teeth occlude with C. Mandibular central incisor
only one tooth in the opposite arch, assuming ideal
relations exist? RATIONALE: Assuming ideal occlusal relations, the mandibular central incisor
A. Maxillary canine occludes with only the maxillary central incisor. The maxillary canine occludes
B. Maxillary first molar with the mandibular canine and 1st premolar whereas the maxillary first molar
C. Mandibular central incisor occludes with both the mandibular first and second molars. Also occluding with
D. Mandibular first premolar more than one tooth is the mandibular 1st premolar which occludes with the
maxillary canine and first premolar.
,The junction of three surfaces on the crown of a tooth is B. point angle
referred to as a(n)
A. line angle. RATIONALE: A point angle is formed by the junction of three surfaces. The point
B. point angle. angle also derives its name from the combination of the names of the surfaces
C. occlusal surface. forming it. For example, the junction of the mesial, buccal, and occlusal surfaces
D. incisal edge. of a molar is called the mesiobucco-occlusal point angle. Each tooth has 4 point
angles. By contrast, a line angle is formed by the junction of two surfaces and
derives its name from the combination of the two surfaces that join. For instance,
on an anterior tooth, the junction of the mesial and labial surfaces is called the
mesiolabial line angle. Each tooth has 8 line angles. The occlusal surface is toward
the opposite arch on a posterior tooth whereas the incisal surface is the surface
of an incisor that is toward the opposite arch.
The primitive oral cavity is/are called the D. stomodeum
A. branchial arches.
B. frontal processes. RATIONALE: At the beginning of the fourth week of embryonic development, five
C. forebrain. facial swellings, called branchial arches, appear on the embryo. The stomodeum
D. stomodeum. (primitive
oral cavity) is the first sign of facial development; the stomodeum is located
between the first branchial arch and the frontal process (forebrain).
On which tooth and surface is the cusp of Carabelli second molars — mesiolingual cusp
located?
The following stages of tooth development are arranged 1. Bud stage—condensed areas of ectomesenchymal cells that are continuous with
in alphabetical order. Rearrange them according to their the oral epithelium; the connection between the two is referred to as the dental
sequence in the developmental timeline, from first to last. lamina
2. Cap stage—future shape of the tooth becomes evident; cells specialize to form
Amelogenesis the enamel organ
Appositional dentin and enamel 3. Bell stage—final stage of morphodifferentiation; in the latter part of this stage,
Bell cytodifferentiation begins in the enamel organ
Bud 4. Dentinogenesis—origin or initial stages of dentin formation
Cap 5. Amelogenesis—differentiated cells begin initial enamel formation
Dentinogenesis 6. Apposition stage—formation of dental tissue matrix; this matrix will then
Eruption and root development undergo maturation or calcification
Functional stage 7. Eruption and root development
8. Functional stage—the tooth has fully erupted in the mouth
, The muscles of facial expression and taste within the VII (facial nerve)
tongue are controlled by cranial nerve
The lingual artery, an anterior branch of the external a. sublingual salivary gland
carotid artery supplies blood to each of the following
areas EXCEPT one. Which one is the EXCEPTION? The lingual artery gives rise to the sublingual artery which then supplies the
sublingual salivary gland, the mylohyoid muscle, and the mucous membranes of
a. sublingual salivary gland the floor of the mouth.
b. tongue
c. suprahyoid muscle
d. floor of the mouth
The interdental col area is particularly susceptible to the absence of keratinization and interproximal location
destruction because of
Each of the following is contained within cellular b. nucleus
cytoplasm EXCEPT one. Which one is the EXCEPTION?
The material inside the nucleus and contained within the nuclear membrane is
a. organelles nucleoplasm. The cytoplasm contains all cellular contents between the plasma
b. nucleus membrane and the nucleus, including the cytosol (fluid portion of cytoplasm),
c. cytoskeleton cytoskeleton (structure of the cell), and the organelles (specialized cellular
d. cytosol structures).
Which of the following oral tissues receives stimuli from c. periodontium
nociceptors, mechanoreceptors, and proprioceptors?
The periodontium receives stimuli for pain (nociceptors) and for position and
a. Dentin pressure (mechanoreceptors and proprioceptors).
b. Hard palate
c. Periodontium
d. Tonsillar pillars
Blood type is determined by the assortment of only antigen A.
glycolipids and glycoproteins, called isoantigens, present
on the surfaces of red blood cells (RBCs). Surfaces of
type A red blood cells display
Cardiac output is determined by the number of heart beats per minute and stroke volume (SV).
STUDY GUIDE 2026 | MOCK EXAM
QUESTIONS, RATIONALES & CHEAT SHEET
| GRADED A+ | GUARANTEED SUCCESS
Updated 2026 Questions and Answers
100% Verified Exam Prep and Comprehensive
Rationales Included
,The surface of the condyle articulates with the D. temporal bone
A. external acoustic meatus.
B. styloid process. RATIONALE: The condyle articulates with temporal bone, forming the moving part
C. coronoid notch. of the TMJ. The external acoustic meatus is the ear canal and does not rotate
D. temporal bone. within the condyle. The styloid process, a pointed piece of bone extending below
the ear, projects down and forward from the inferior surface of the temporal
bone. The coronoid notch, also called the coronoid process, is a concavity on the
anterior border of the ramus of the mandible.
A structure in the cell that contains a single, circular DNA, A. mitochondria
and synthesizes adenosine triphosphate (ATP) is the
A. mitochondria. RATIONALE: Mitochondria are powerful cellular organelles that contain a single
B. lysosome. circular DNA, and synthesize the body's primary source of energy, adenosine
C. endoplasmic reticulum. triphosphate (ATP). Lysosomes contain digestive enzymes and lead the
D. Golgi apparatus. breakdown of foreign substances by the process of phagocytosis. Endoplasmic
reticulum is involved in protein synthesis and the transport of nutrients to the
nucleus. The golgi apparatus stores, packs, and transfers proteins and other
cellular components to the exterior of a secretory cell.
Which tooth is known for its bifurcated root? D. maxillary first premolar
A. Mandibular second premolar
B. Maxillary second premolar RATIONALE: In about 60% of maxillary 1st premolars a bifurcation occurs in the
C. Maxillary first premolar apical third to half of the root. This bifurcation forms one facial and one lingual
D. Mandibular first premolar root. The mandibular second premolar, the maxillary second premolar, and the
mandibular first premolar each have only one root.
Which of the following permanent teeth occlude with C. Mandibular central incisor
only one tooth in the opposite arch, assuming ideal
relations exist? RATIONALE: Assuming ideal occlusal relations, the mandibular central incisor
A. Maxillary canine occludes with only the maxillary central incisor. The maxillary canine occludes
B. Maxillary first molar with the mandibular canine and 1st premolar whereas the maxillary first molar
C. Mandibular central incisor occludes with both the mandibular first and second molars. Also occluding with
D. Mandibular first premolar more than one tooth is the mandibular 1st premolar which occludes with the
maxillary canine and first premolar.
,The junction of three surfaces on the crown of a tooth is B. point angle
referred to as a(n)
A. line angle. RATIONALE: A point angle is formed by the junction of three surfaces. The point
B. point angle. angle also derives its name from the combination of the names of the surfaces
C. occlusal surface. forming it. For example, the junction of the mesial, buccal, and occlusal surfaces
D. incisal edge. of a molar is called the mesiobucco-occlusal point angle. Each tooth has 4 point
angles. By contrast, a line angle is formed by the junction of two surfaces and
derives its name from the combination of the two surfaces that join. For instance,
on an anterior tooth, the junction of the mesial and labial surfaces is called the
mesiolabial line angle. Each tooth has 8 line angles. The occlusal surface is toward
the opposite arch on a posterior tooth whereas the incisal surface is the surface
of an incisor that is toward the opposite arch.
The primitive oral cavity is/are called the D. stomodeum
A. branchial arches.
B. frontal processes. RATIONALE: At the beginning of the fourth week of embryonic development, five
C. forebrain. facial swellings, called branchial arches, appear on the embryo. The stomodeum
D. stomodeum. (primitive
oral cavity) is the first sign of facial development; the stomodeum is located
between the first branchial arch and the frontal process (forebrain).
On which tooth and surface is the cusp of Carabelli second molars — mesiolingual cusp
located?
The following stages of tooth development are arranged 1. Bud stage—condensed areas of ectomesenchymal cells that are continuous with
in alphabetical order. Rearrange them according to their the oral epithelium; the connection between the two is referred to as the dental
sequence in the developmental timeline, from first to last. lamina
2. Cap stage—future shape of the tooth becomes evident; cells specialize to form
Amelogenesis the enamel organ
Appositional dentin and enamel 3. Bell stage—final stage of morphodifferentiation; in the latter part of this stage,
Bell cytodifferentiation begins in the enamel organ
Bud 4. Dentinogenesis—origin or initial stages of dentin formation
Cap 5. Amelogenesis—differentiated cells begin initial enamel formation
Dentinogenesis 6. Apposition stage—formation of dental tissue matrix; this matrix will then
Eruption and root development undergo maturation or calcification
Functional stage 7. Eruption and root development
8. Functional stage—the tooth has fully erupted in the mouth
, The muscles of facial expression and taste within the VII (facial nerve)
tongue are controlled by cranial nerve
The lingual artery, an anterior branch of the external a. sublingual salivary gland
carotid artery supplies blood to each of the following
areas EXCEPT one. Which one is the EXCEPTION? The lingual artery gives rise to the sublingual artery which then supplies the
sublingual salivary gland, the mylohyoid muscle, and the mucous membranes of
a. sublingual salivary gland the floor of the mouth.
b. tongue
c. suprahyoid muscle
d. floor of the mouth
The interdental col area is particularly susceptible to the absence of keratinization and interproximal location
destruction because of
Each of the following is contained within cellular b. nucleus
cytoplasm EXCEPT one. Which one is the EXCEPTION?
The material inside the nucleus and contained within the nuclear membrane is
a. organelles nucleoplasm. The cytoplasm contains all cellular contents between the plasma
b. nucleus membrane and the nucleus, including the cytosol (fluid portion of cytoplasm),
c. cytoskeleton cytoskeleton (structure of the cell), and the organelles (specialized cellular
d. cytosol structures).
Which of the following oral tissues receives stimuli from c. periodontium
nociceptors, mechanoreceptors, and proprioceptors?
The periodontium receives stimuli for pain (nociceptors) and for position and
a. Dentin pressure (mechanoreceptors and proprioceptors).
b. Hard palate
c. Periodontium
d. Tonsillar pillars
Blood type is determined by the assortment of only antigen A.
glycolipids and glycoproteins, called isoantigens, present
on the surfaces of red blood cells (RBCs). Surfaces of
type A red blood cells display
Cardiac output is determined by the number of heart beats per minute and stroke volume (SV).
