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Spinal Anatomy > Embryo HW Questions > Flashcards

Embryo HW Questions Flashcards

1
Q

What are the paraxial mesodermal structures that form alongside the neural tube?

A

somites

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2
Q

Match the primordial gray matter to the cells it contains and the structure it becomes in the mature cord.

-ventral horn
-dorsal horn
-sensory neurons
-motor neurons
-interneurons

> alar plate
basal plate
neither

A

ventral horn= basal plate

dorsal horn = alar plate

sensory neurons = neither

motor neurons= basal plate

interneurons= alar plate

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3
Q

Which statement lists the three components of a somite?
A) epiblast, dermablast, myoblast
B) sclerotome, myotome, dermatome
C) ectoderm, mesoderm, endoderm
D) scleroderm, myoderm, epiderm

A

B) sclerotome, myotome, dermatome

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4
Q

A remnant of the notochord forms the _______________

A

nucleus pulposus

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5
Q

Primordial motor and sensory axons form ventral and dorsal nerve roots that join together ______________ the intervertebral foramen to form a spinal nerve.

A

proximal to

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6
Q

What type of structure forms in between the space created by re-segmentation?

A

Intervertebral disc

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7
Q

Which event causes the sclerotome to separate and the caudle portion to fuse with rostral portion?
A) resegmentation
B) Migration of the segmental arteries through the scleratome
C) Closure of the caudal neuropores
D) aggregation of neural crest cells

A

A) resegmentation

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8
Q

What do sclerotome cells eventually form that surround the neural tube?

A

Neural arch

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9
Q

Arrange the correct order of gray matter development in the embryonic spinal cord.

-ectoderm
-neuroepithelial cells
-neuroectoderm
-neuroblast cells
-neuron cell bodies

A

-ectoderm
-neuroectoderm
-neuroepithelial cells
-neuroblast cells
-neuron cell bodies

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10
Q

Where do sensory neurons initially appear?

A

Dorsal root ganglia

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11
Q

Which germ layer does the epiblast layer become in the trilaminar disc?

A

ectoderm

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12
Q

The following describe characteristics of the notochord EXCEPT:
A) Is the first primordial axial support of the embryo
B) Becomes the nucleus pulposus
C) Formed by aggregation of mesoderm cells beneath the primitive streak
D) Provides the structure around which the vertebral arches to form

A

D) Provides the structure around which the vertebral arches to form

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13
Q

What happens during invagination?
A) Formation of primitive streak
B) Aggregation of mesoderm under primitive streak
C) Epiblast cells migrate through the primitive streak
D) Formation of the primitive node

A

C) Epiblast cells migrate through the primitive streak

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13
Q

What is the main goal of gastrulation?

A

formation of the three primary germ layers

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14
Q

Which germ layer gives rise to the brain and spinal cord?

A

ectoderm

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15
Q

Which germ layer gives rise to neural crest cells?

A

ectoderm

16
Q

Which germ layer gives rise to the notochord?

A

mesoderm

17
Q

Which germ layer gives rise to somites?

A

mesoderm

18
Q

Which germ layer gives rise to epithelial linings?

A

endoderm

19
Q

What type of cell gives rise to all three primary germ layers?

A

epiblast

20
Q

These statements correctly describe the primitive streak EXCEPT:
A) Appears at the caudal end of the bilaminar disc
B) Initiates gastrulation
C) Establishes the major body axises of the embryo
D) Gives rise to the notochord

A

D) Gives rise to the notochord

21
Q

What are the primary germ layers?

A

ectoderm, mesoderm, and endoderm

22
Q

Fusion of the neural tube begins in the ________ region

A

cervical

23
Q

Which region of the embryonic disc does the neural tube initially close?

A

Cervical

24
Q

What event initiates the neurulation phase in embryonic development?
A) Fusion of neural folds
B) Development of somites
C) Migration of neural crest cells
D) Chemicals released by notochord

A

D) Chemicals released by notochord

25
Q

The following describes the neural plate EXCEPT:
A) Arises from ectoderm
B) Differentiates into neuroectoderm
C) Thickened area around the primitive streak
D) Forms the brain and spinal cord

A

C) Thickened area around the primitive streak

26
Q

These statements are correct about neural crest cells EXCEPT?
A) Form dorsal root ganglia
B) Differentiate into paraxial somites
C) Develop at lateral margin of neural plate
D) Arise from ectoderm

A

B) Differentiate into paraxial somites

27
Q

What is the goal of neurulation?

A

Formation of the embryonic brain and spinal cord

28
Q

What event forms the neural tube?
A) Opening of neuropores
B) Fusing of neural folds
C) Formation primary brain vesicles

A

B) Fusing of neural folds

29
Q

The rostral neuropores close around day 25 and the caudate neuropores close around day ____

A

28

30
Q

These are the primary brain vesicles formed by neurulation EXCEPT:
A) Diencephalon
B) Mesencephalon
C) Proencephalon
D) Rhombencephalon

A

A) Diencephalon

Spinal Anatomy (12 decks)

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