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NBDHE Board 213 Study Questions and Answers

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Conquer the National Board Dental Hygiene Examination (NBDHE) with this focused study guide featuring 213 essential practice questions and verified answers. This targeted resource is designed for high-yield review, covering critical topics across all exam domains: the scientific basis for clinical practice, patient care (assessment, planning, implementation, evaluation), community health and research principles, and professional responsibility. Each question is crafted to reinforce must-know concepts in areas like pharmacology, periodontology, oral pathology, pain control, and radiology. With clear rationales for every answer, this guide helps solidify your understanding, improve recall, and efficiently prepare you to tackle the breadth of content on the NBDHE with confidence.

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NBDHE Board 213 Study Questions
and Answers
A drug ending in the suffix 'pril is considered a
A. antibiotic
B.ACE inhibitor
C. anti fungal
D. beta antagonist -
==B. ACE inhibitor

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 -
==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% -
==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 -
==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% -
==B. 5-10%

Untreated diabetes may result in all of the following EXCEPT:
A. blindness
B. cardiovascular disease
C. kidney disease
D. tinnitus -
==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 -
==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 -
==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 -
==D. IgE

how to remember: "Eeeek, I had an allergic reaction"

Which of the following types of immunoglobulins is located on the surface of most B-
lymphocytes?
A. IgA
B. IgM
C. IgD
D. IgE -
==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 -
==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 -
==D. Alzheimers disease

T-cell activation requires a/an _____ cell
A. Activation
B. Accessory
C. Plasma
D. Helper -
==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 -
==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 -
==d. tibial

Lymphocytes that reach the thymus become
a. t cells
b. b cells
c. plasma cells
d. beta cells -
==a. t cells

lymphocytes that do not reach the thymus become
a. t cells
b. b cells
c. plasma cells
d. beta cells -
==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 -
==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 -
==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 -
==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 -
==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) -
==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 -
==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 -
==C. Cortical

The first succedaneous tooth to erupt is the:

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