NBDE Part I Remembered Exam Newest
2026 Questions and Correct Answers
Already Graded A+
What is the cause of brown and grey tooth discoloration? - CORRECT
ANSWER-Tetracycline before the age of 2
What color does minocycline cause the teeth to turn? - CORRECT ANSWER-
Grey and BLUE
What is the Granular layer of Tomes? - CORRECT ANSWER-It is located within
dentin located at the root of the tooth beneath the dentinocemental junction
What structure pierces the buccinator muscle? - CORRECT ANSWER-Parotid
gland DUCT
What type of collagen is present in the PDL? - CORRECT ANSWER-Type I
(mainly)
Type III and V
,When are alveoli most negative? - CORRECT ANSWER-At the beginning of
inhalation
What muscles abduct the scapula? - CORRECT ANSWER-Serratus anterior
Pectoralis
What muscles retract the scapula? - CORRECT ANSWER-Trapezius
Rhomboids
Where do the globular heads of C1q exclusively bind to? - CORRECT ANSWER-
CH2 domain of IgG
CH3 domain of IgM
The philtrum of the lip is formed from what? - CORRECT ANSWER-Medial nasal
processes and maxillary processes
Unilateral cleft lip is caused by what? - CORRECT ANSWER-When the maxillary
prominence on the affected side fails to join with the merged medial nasal
prominences
,What is the most abundant papilla on the tongue? - CORRECT ANSWER-
Filiform
Esophageal varices are commonly seen in what? - CORRECT ANSWER-
Alcoholics
What type of hypersensitivity reaction is present in SLE? - CORRECT ANSWER-
Type III (immune-antibody complex)
What are the symptoms of SLE? - CORRECT ANSWER-Women
Inflammation in joints, tendons and other CT and organs.
Butterfuly rash over cheeks and bridge of nose
Individuals with SLE can have a false positive of what other disease? - CORRECT
ANSWER-Syphilis
What are the sensory and motor components of the gag reflex? - CORRECT
ANSWER-Sensory - Glossopharyngeal
Motor - Vagus
, What ligament prevents excessive retraction of the TMJ? - CORRECT ANSWER-
TMJ ligament
How does the TMJ get nutrients? - CORRECT ANSWER-Through diffusion from
the disk (synovial membrane and synovial fluid provide nourishment and
lubrication)
What artery supplies nutrients to the TMJ? - CORRECT ANSWER-External
carotid artery
What structure passes deep to they hyoglossus muscle? - CORRECT ANSWER-
Lingual ARTERY
Each of the following structures lies between the hyoglossus and the mylohyoid
muscles EXCEPT one. - CORRECT ANSWER-Lingual ARTERY
What premolar has the shorter central groove and more supplemental grooves? -
CORRECT ANSWER-Second maxillary premolar
2026 Questions and Correct Answers
Already Graded A+
What is the cause of brown and grey tooth discoloration? - CORRECT
ANSWER-Tetracycline before the age of 2
What color does minocycline cause the teeth to turn? - CORRECT ANSWER-
Grey and BLUE
What is the Granular layer of Tomes? - CORRECT ANSWER-It is located within
dentin located at the root of the tooth beneath the dentinocemental junction
What structure pierces the buccinator muscle? - CORRECT ANSWER-Parotid
gland DUCT
What type of collagen is present in the PDL? - CORRECT ANSWER-Type I
(mainly)
Type III and V
,When are alveoli most negative? - CORRECT ANSWER-At the beginning of
inhalation
What muscles abduct the scapula? - CORRECT ANSWER-Serratus anterior
Pectoralis
What muscles retract the scapula? - CORRECT ANSWER-Trapezius
Rhomboids
Where do the globular heads of C1q exclusively bind to? - CORRECT ANSWER-
CH2 domain of IgG
CH3 domain of IgM
The philtrum of the lip is formed from what? - CORRECT ANSWER-Medial nasal
processes and maxillary processes
Unilateral cleft lip is caused by what? - CORRECT ANSWER-When the maxillary
prominence on the affected side fails to join with the merged medial nasal
prominences
,What is the most abundant papilla on the tongue? - CORRECT ANSWER-
Filiform
Esophageal varices are commonly seen in what? - CORRECT ANSWER-
Alcoholics
What type of hypersensitivity reaction is present in SLE? - CORRECT ANSWER-
Type III (immune-antibody complex)
What are the symptoms of SLE? - CORRECT ANSWER-Women
Inflammation in joints, tendons and other CT and organs.
Butterfuly rash over cheeks and bridge of nose
Individuals with SLE can have a false positive of what other disease? - CORRECT
ANSWER-Syphilis
What are the sensory and motor components of the gag reflex? - CORRECT
ANSWER-Sensory - Glossopharyngeal
Motor - Vagus
, What ligament prevents excessive retraction of the TMJ? - CORRECT ANSWER-
TMJ ligament
How does the TMJ get nutrients? - CORRECT ANSWER-Through diffusion from
the disk (synovial membrane and synovial fluid provide nourishment and
lubrication)
What artery supplies nutrients to the TMJ? - CORRECT ANSWER-External
carotid artery
What structure passes deep to they hyoglossus muscle? - CORRECT ANSWER-
Lingual ARTERY
Each of the following structures lies between the hyoglossus and the mylohyoid
muscles EXCEPT one. - CORRECT ANSWER-Lingual ARTERY
What premolar has the shorter central groove and more supplemental grooves? -
CORRECT ANSWER-Second maxillary premolar
