NBDHE BOARD STUDY QUESTIONS
AND ANSWERS 100% CORRECT
A drug ending in the suffix 'pril is considered a
A. antibiotic
B.ACE inhibitor
C. anti fungal
D. beta antagonist - ANSWER-B. ACE inhibitor
Which of the following types of immunoglobulins is located on the surface of most B-
lymphocytes?
A. IgA
B. IgM
C. IgD
D. IgE - ANSWER-C. IgD
Which of the following types of immunoglobulins does NOT cross the barrier between
mother and infant in the womb?
A. IgA
B. IgM
C. IgD
D. IgE - ANSWER-A. IgA
Which of the following is NOT an autoimmune disease?
A. Graves Disease
B. Myasthenia Gravis
C. Insulin-dependent diabetes mellitus
D. Alzheimers disease - ANSWER-D. Alzheimers disease
T-cell activation requires a/an _____ cell
A. Activation
B. Accessory
C. Plasma
D. Helper - ANSWER-B. accessory
Which of the following statements is FALSE regarding the spleen?
A. Divided up into lobules
B. Similar to a large lymph node
C. Contains macrophages
D. limited blood within the lobules - ANSWER-D. limited blood within the lobules
Which of the following is NOT considered a central location of lymph nodes?
A. cervical
,b. axillary
c. inguinal
d. tibial - ANSWER-d. tibial
Which of the following is NOT considered to be a risk factor for a type 1 diabetic?
A. diet
B. genetics
C. autoimmune
D. environmental - ANSWER-A. diet
Type 2 diabetes accounts for approximately what percentage of all cases of diabetes in
adults?
A. 25-30%
B/ 35-40%
C. 55-60%
D. 90-95% - ANSWER-D. 90-95%
Which of the following is NOT considered to be a risk factor for a type 2 diabetic?
A. increased age
B. obesity
C. smoking
D. physical inactivity - ANSWER-c. smoking
What percentage of women with gestational diabetes are diagnosed with type 2
diabetes following their pregnancy?
A. <5%
B. 5-10%
C. 20-25%
D. 25-30% - ANSWER-B. 5-10%
Untreated diabetes may result in all of the following EXCEPT:
A. blindness
B. cardiovascular disease
C. kidney disease
D. tinnitus - ANSWER-D. tinnitus
-ringing of the ears
Prediabetes is associated with all of the following except:
a. Increased risk of developing type 2 diabetes
b. Impaired glucose tolerance
c. Increased risk of heart disease and stroke
d. Increased risk of developing type 1 diabetes - ANSWER-D. increased risk of
developing type 1 diabetes
,-persons with elevated glucose levels that do not yet meet the criteria for diabetes are
considered to have prediabetes and are at increased risk for type 2 diabetes, not type 1
diabetics are at increased risk of heart disease if they also
a. smoke
b. have increased HDL cholesterol levels
c. take aspirin
D. consume increased fiber in diet - ANSWER-A. smoke
Which of the following types of immunoglobulins is the most responsible for promoting
allergic reactions?
A. IgA
B. IgD
C. IgM
D. IgE - ANSWER-D. IgE
how to remember: "Eeeek, I had an allergic reaction"
Lymphocytes that reach the thymus become
a. t cells
b. b cells
c. plasma cells
d. beta cells - ANSWER-a. t cells
lymphocytes that do not reach the thymus become
a. t cells
b. b cells
c. plasma cells
d. beta cells - ANSWER-b. b cells
Each of the following describes nitrous oxide EXCEPT
a. it is widely used by hospital anesthesiologists
b. it is not metabolized
c. minimally alters cardiac output
d. it is explosive - ANSWER-d. it is explosive. not explosive on its own.
As an x-ray tube operates, electrons carry energy from the cathode to the anode. Which
of the following is most of this energy converted to in the target?
A. heat
b. x-rays
c. electricity
D. visible light - ANSWER-A. heat
which select group of antihypertensive medications has the mechanism of action that
involves blocking the conversion of angiotensin I to II?
A. beta blockers
, b. thaizides
c. ACE inhibitors
d. angiotensin receptor blockers
e. calcium channel blockers - ANSWER-c. ACE inhibitors
What term describes a molecule that is not immunogenic by itself, but can react with a
specific antibody?
A. Complement
B. Hapten
C. Interleukin
D. Immunoglobulin - ANSWER-B. Hapten
Which of the following fluoride applications would be contraindicated for use on
porcelain and composite restorations?
A. 0.4% SnF2 (brush on or tray)
B. 0.05% APF (tray)
C. 1.1% NaF (brush on or tray)
D. 0.05% NaF (rinse) - ANSWER-B. 0.05% APF
-this is due to its low pH of 3.5 which may cause etching or pitting of porcelain and
composite restorations
A radiographic examination reveals a radiolucent area in the region of the mandibular
left third molar. The third molar is not present. The clinical differential diagnoses should
include each of the following EXCEPT one. Which one is the EXCEPTION?
A. Ameloblastoma
B. Residual cyst
C. Odontogenic keratocyst
D. Dentigerous cyst - ANSWER-D. Dentigerous cyst
The most external layer of alveolar bone is the:
A. Spongy bone
B. Spicule bone
C. Cortical bone
D. Woven bone
E. Cribriform plate - ANSWER-C. Cortical
The first succedaneous tooth to erupt is the:
A. Perm. max central incisor
B. Prim. mand central incisor
C. Perm. mand central incisor - ANSWER-C. perm. mand central incisor
The glenoid fossa is an oval cavity or a depression in the
A. maxilla, just anterior to the molar process
B. temporal bone
C. mandible
AND ANSWERS 100% CORRECT
A drug ending in the suffix 'pril is considered a
A. antibiotic
B.ACE inhibitor
C. anti fungal
D. beta antagonist - ANSWER-B. ACE inhibitor
Which of the following types of immunoglobulins is located on the surface of most B-
lymphocytes?
A. IgA
B. IgM
C. IgD
D. IgE - ANSWER-C. IgD
Which of the following types of immunoglobulins does NOT cross the barrier between
mother and infant in the womb?
A. IgA
B. IgM
C. IgD
D. IgE - ANSWER-A. IgA
Which of the following is NOT an autoimmune disease?
A. Graves Disease
B. Myasthenia Gravis
C. Insulin-dependent diabetes mellitus
D. Alzheimers disease - ANSWER-D. Alzheimers disease
T-cell activation requires a/an _____ cell
A. Activation
B. Accessory
C. Plasma
D. Helper - ANSWER-B. accessory
Which of the following statements is FALSE regarding the spleen?
A. Divided up into lobules
B. Similar to a large lymph node
C. Contains macrophages
D. limited blood within the lobules - ANSWER-D. limited blood within the lobules
Which of the following is NOT considered a central location of lymph nodes?
A. cervical
,b. axillary
c. inguinal
d. tibial - ANSWER-d. tibial
Which of the following is NOT considered to be a risk factor for a type 1 diabetic?
A. diet
B. genetics
C. autoimmune
D. environmental - ANSWER-A. diet
Type 2 diabetes accounts for approximately what percentage of all cases of diabetes in
adults?
A. 25-30%
B/ 35-40%
C. 55-60%
D. 90-95% - ANSWER-D. 90-95%
Which of the following is NOT considered to be a risk factor for a type 2 diabetic?
A. increased age
B. obesity
C. smoking
D. physical inactivity - ANSWER-c. smoking
What percentage of women with gestational diabetes are diagnosed with type 2
diabetes following their pregnancy?
A. <5%
B. 5-10%
C. 20-25%
D. 25-30% - ANSWER-B. 5-10%
Untreated diabetes may result in all of the following EXCEPT:
A. blindness
B. cardiovascular disease
C. kidney disease
D. tinnitus - ANSWER-D. tinnitus
-ringing of the ears
Prediabetes is associated with all of the following except:
a. Increased risk of developing type 2 diabetes
b. Impaired glucose tolerance
c. Increased risk of heart disease and stroke
d. Increased risk of developing type 1 diabetes - ANSWER-D. increased risk of
developing type 1 diabetes
,-persons with elevated glucose levels that do not yet meet the criteria for diabetes are
considered to have prediabetes and are at increased risk for type 2 diabetes, not type 1
diabetics are at increased risk of heart disease if they also
a. smoke
b. have increased HDL cholesterol levels
c. take aspirin
D. consume increased fiber in diet - ANSWER-A. smoke
Which of the following types of immunoglobulins is the most responsible for promoting
allergic reactions?
A. IgA
B. IgD
C. IgM
D. IgE - ANSWER-D. IgE
how to remember: "Eeeek, I had an allergic reaction"
Lymphocytes that reach the thymus become
a. t cells
b. b cells
c. plasma cells
d. beta cells - ANSWER-a. t cells
lymphocytes that do not reach the thymus become
a. t cells
b. b cells
c. plasma cells
d. beta cells - ANSWER-b. b cells
Each of the following describes nitrous oxide EXCEPT
a. it is widely used by hospital anesthesiologists
b. it is not metabolized
c. minimally alters cardiac output
d. it is explosive - ANSWER-d. it is explosive. not explosive on its own.
As an x-ray tube operates, electrons carry energy from the cathode to the anode. Which
of the following is most of this energy converted to in the target?
A. heat
b. x-rays
c. electricity
D. visible light - ANSWER-A. heat
which select group of antihypertensive medications has the mechanism of action that
involves blocking the conversion of angiotensin I to II?
A. beta blockers
, b. thaizides
c. ACE inhibitors
d. angiotensin receptor blockers
e. calcium channel blockers - ANSWER-c. ACE inhibitors
What term describes a molecule that is not immunogenic by itself, but can react with a
specific antibody?
A. Complement
B. Hapten
C. Interleukin
D. Immunoglobulin - ANSWER-B. Hapten
Which of the following fluoride applications would be contraindicated for use on
porcelain and composite restorations?
A. 0.4% SnF2 (brush on or tray)
B. 0.05% APF (tray)
C. 1.1% NaF (brush on or tray)
D. 0.05% NaF (rinse) - ANSWER-B. 0.05% APF
-this is due to its low pH of 3.5 which may cause etching or pitting of porcelain and
composite restorations
A radiographic examination reveals a radiolucent area in the region of the mandibular
left third molar. The third molar is not present. The clinical differential diagnoses should
include each of the following EXCEPT one. Which one is the EXCEPTION?
A. Ameloblastoma
B. Residual cyst
C. Odontogenic keratocyst
D. Dentigerous cyst - ANSWER-D. Dentigerous cyst
The most external layer of alveolar bone is the:
A. Spongy bone
B. Spicule bone
C. Cortical bone
D. Woven bone
E. Cribriform plate - ANSWER-C. Cortical
The first succedaneous tooth to erupt is the:
A. Perm. max central incisor
B. Prim. mand central incisor
C. Perm. mand central incisor - ANSWER-C. perm. mand central incisor
The glenoid fossa is an oval cavity or a depression in the
A. maxilla, just anterior to the molar process
B. temporal bone
C. mandible
