NBCE Part 1 Exam Questions With Accurate Answers A+ Grade

NBCE Part 1 Exam Questions With Accurate
Answers 2025\2026 A+ Grade
What are the embryologic germinal layers
- accurate answers-Endoderm
Mesoderm
Ectoderm

What are the four subgroups of embryologic mesoderm
- accurate answers-1. Paraxial
- somatic
- splanchnic
2. Intermediate
3. Head
4. Lateral Plate

When considering the subgroup Paraxial of the four different types of
embryologic subgroups for germinal layer Mesoderm, what are the two
different types within this subgroup type
- accurate answers-1. Somatic
2. Splanchnic

What is embryologic germinal layer ectoderm associated with
- accurate answers-Nerve and skin

What are the embryologic derivatives of germinal layer endoderm
- accurate answers-Organs, guts, respiratory tract "tubular structures"

What are the EMBRYOLOGIC derivatives of GERMINAL LAYER MESODERM
when considering only the PARAXIAL SOMATIC subgroup
- accurate answers-Musculoskeletal: muscles, ligaments and tendons

What are the derivatives of EMBRYOLOGIC GERMINAL LAYER MESODERM
subgroup PARAXIAL SPLANCHNIC
- accurate answers-smooth muscle of organs

What are the embryologic derivatives of GERMINAL MESODERM subgroup
INTERMEDIATE
- accurate answers-Urogenital system and kidneys

,What are the EMBRYOLOGIC derivatives of GERMINAL LAYER MESODERM
subgroup HEAD
- accurate answers-Skull muscles and dentine of teeth

What are the EMBRYOLOGIC derivatives of GERMINAL LAYER MESODERM
subgroup LATERAL PLATE
- accurate answers-Adrenal cortex, CT, cardiovascular and lymph

What are the SUBGROUPS of ECTODERM
- accurate answers-Surface Ectoderm and Neuro Ectoderm

What are the two different SUBGROUP types of embryologic germinal layer
ectoderm, when considering NEUROECTODERM exclusively
- accurate answers-1. Neural Tube
2. Neural Crest

What are the derivatives of embryologic germinal layer ECTODERM,
SUBGROUP SURFACE ECTODERM
- accurate answers-Epidermis, Ant. Pituitary, Lens of Eye, Skin, Enamel, Hair

When considering embryologic germinal layer ECTODERM and its subgroup
NEUROECTODERM, what are the derivatives of the NEURAL TUBE, one of the
two types of SUBGROUPS for NEUROECTODERM
- accurate answers-The derivatives are not exclusive to the CNS and are the
brain and spinal cord

This subgroup also derives the NEURAL TUBE, Post. Pituitary, RETINA, CNS,
and OLIGODENDROCYTES

When considering the embryologic germinal layer ECTODERM and its
SUBGROUP, NEURAL CREST, one of two types of this particular subgroup,
what are its derivatives
- accurate answers-The derivatives of this SUBGROUP type are OUTSIDE of
the CNS and are:
SYMPATHETIC CHAIN AND GANGLION, DORSAL ROOT GANGLION,
AUTONOMIC NERVOUS SYSTEM, PERIPHERAL NERVOUS SYSTEM, SCWANN
CELLS, PARAFOLLICULAR CELLS OF THYROID, ADRENAL MEDULLA

,What are the CENTRAL NERVOUS SYSTEM PATHOLOGIES which are DERIVED
from the NEURAL TUBE
- accurate answers-- Spina Bifida Occulta
- Meningocele
- Myelocele
- Meningomyelocele
- Arnold Chiari Syndrome Type 1
- Arnold Chiari Syndrome Type 2
- Cleft Palate
- Anencephaly

What are the key clinical features of CNS PATHOLOGY SPINA BIFIDA
OCCULTA with derivatives associated with the NEURAL TUBE
- accurate answers-The lamina fail to fuse and there is a tuft of hair that
develops over this site, known as a Fawn's Beard

What are the key clinical features of CNS PATHOLOGY MENINGOCELE with
derivatives associated with the NEURAL TUBE
- accurate answers-Meninges protrude out

What are the key clinical features of CNS PATHOLOGY MYELOCELE with
derivatives associated with the NEURAL TUBE
- accurate answers-Spinal cord protrudes out because meninges are not
developed properly

What are the key clinical features of CNS PATHOLOGY MENINGOMYELOCELE
with derivates that are associated with the NEURAL TUBE
- accurate answers-Spinal cord and meninges protrude out

What are the key clinical features of CNS PATHOLOGY ARNOLD CHIARI
SYNDROME TYPE 1, where the derivatives are associated with the NEURAL
TUBE
- accurate answers-Cerebellar peduncles come below the foramen magnum

What are the key clinical features of CNS PATHOLOGY ARNOLD CHIARI
SYNDROME TYPE 2, where the derivatives are associated with the NEURAL
TUBE
- accurate answers-You will see the signs of type 1 Arnold Chiari Malformation

, (Cerebellar Peduncles below the Foramen Magnem) as well as the signs of
Meningomyelocele (spinal cord and meninges protrude out)

What are the key clinical features of CNS PATHOLOGY CLEFT PALATE, where
the derivatives are associated with the NEURAL TUBE
- accurate answers-It is a failure of the MAXILLARY AND PALATINE BONES to
fuse

What are the key clinical features of CNS PATHOLOGY ANENCEPHALY, where
the derivatives are associated with the NEURAL TUBE
- accurate answers-Absence of a major portion of the brain, skull and scalp
(most severe)

What vitamin is associated with the healthy development of the NEURAL
TUBE and helps remediate the possibility of CNS pathologies associated with
NEURAL TUBE defects
- accurate answers-B9/ Folic Acid/ Methyl Folate/ Tetrahydrofolate

During the MESODERMAL embryologic stage of development what develops
and what does it persist to
- accurate answers-During this stage of development the notochord develops
and persists as the nucleus pulpous, later assisting in the development of the
neural tube

How many pairs of MESODERMAL SOMITES develop during the
MESODERMAL EMBRYOLOGIC STAGE OF DEVELOPMENT and what are the
three SUBGROUP TYPES
- accurate answers-31 pairs of MESODERMAL SOMITES develop from the
PARAXIAL MESODERM, respectively referred to as
1. SCLEROTOME
2. MYOTOME
3. DERMATOME

What develops when considering the SCLEROTOME MESODERMAL
EMBRYOLOGIC STAGE OF DEVELOPMENT EXCLUSIVELY
- accurate answers-Membranous vertebral column