Embryology Moodle quiz

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Branchial arches

All share common blood supply

Each have their own nerve supply (correct)

Made up of ectoderm, mesoderm and endoderm

Have derivatives for all 6 arches

Derivatives of ectoderm include

Skin (correct)

Muscles

Skeleton

Enamel (correct)

During embryology the blastocyst

Is a solid ball of cells that forms from cleavage of the zygote

Is a fluid filled ball of cells that forms after formation of morula (correct)

Is a fluid filled ball of cells that forms after fertilisation of the zygote

Is a solid ball of cells that forms from cleavage of the morula

Neural crest cells give rise to

Ectomesenchyme and connective tissue in the head (C) Signup and view all the answers

Select correct answer regarding development of tongue

The tongue is innervated by Glossopharyngeal and trigeminal nerve (D) Signup and view all the answers

This branchial arch does not give rise to any structures

V (C) Signup and view all the answers

The branchial arches innervated by Glossopharyngeal nerve are

III (B) Signup and view all the answers

The derivatives of these branchial arches are innervated by trigeminal nerve

I (A) Signup and view all the answers

Development of face begins at

Week 4 (A) Signup and view all the answers

The development of the secondary palate

Creates barrier between oral and nasal cavities (C) Signup and view all the answers

The face begins to form from which process

Frontonasal (B) Signup and view all the answers

The muscular derivatives of these branchial arches are the muscles of facial expression

II (C) Signup and view all the answers

The philtrum forms

Fusion from maxillary and medial nasal processes (D) Signup and view all the answers

Which branchial arch gives rise to mandible

I (D) Signup and view all the answers

Cleft palate is a development anomalie that results from

the failure of fusion of the palatine shelves together and the nasal septum (B) Signup and view all the answers

Duing childhood development, at age 4, environmental factors such as too much fluoide, can disrupt the amelogenesis process for permanent teeth.

False (B) Signup and view all the answers

Ameloblasts form conical projections called Tomes Processes during which of the following stages of amelogenesis:

secretory (D) Signup and view all the answers

Differentiation of ameloblasts from pre-ameloblasts takes place in which of the following stages of tooth development?

Bell stage (C) Signup and view all the answers

Enamel, gingiva and the skin are direct derivatives of the ectoderm.

True (A) Signup and view all the answers

During amelogenesis which cellular layer of the enamel organ collapses to allow for space for the ameloblasts:

stellate reticulum (D) Signup and view all the answers

During fetal development, amelogenesis for all primary teeth is completed before birth:

True (A) Signup and view all the answers

During odontogenesis, the dental sac gives rise to:

The supporting structures of the teeth (D) Signup and view all the answers

Cleft palate develops when there is a failure of fusion of which structures?

The palatine shelves together and the nasal septum (D) Signup and view all the answers

Odontogenesis starts with the following cellular layers at its initiation stage:

ectomesenchyme and oral epithelium (A) Signup and view all the answers

Select the single best answer:

The stellate reticulum plays a key role in amelogenesis by providing nutients to the ameloblasts (A) Signup and view all the answers

Select the single best answer:

All oral tissues originate from the ectoderm and the ectomesenchyme (neural crest cells) (C) Signup and view all the answers

The origin of the dento-gingival junction is the:

Reduced enamel epithelium (B) Signup and view all the answers

The lifecycle of the ameloblast is:

limited to the time the tooth erupts (D) Signup and view all the answers

The long junctional epithelium originates from:

Ectoderm → oral epithelium → outer enamel epithelium (C) Signup and view all the answers

The morphology of the tooth crown starts to be determined at which stage of development:

Early bell stage (B) Signup and view all the answers

The prevalence of cleft lip and palate in the UK is approximately 1 in 700 live births:

True (A) Signup and view all the answers

The lifecycle of the odontoblast:

continues throughout the life of the tooth (D) Signup and view all the answers

Which branchial arches do the muscles of mastication derive from?

I (B) Signup and view all the answers

Which cellular layer of the enamel organ shrinks during amelogenesis to allow for space for the ameloblasts?

stellate reticulum (D) Signup and view all the answers

Which two cellular layers are present at the dental lamina stage of tooth development?

oral epithelium and ectomesenchyme (B) Signup and view all the answers

Which stage of tooth development is the morphology of the tooth crown determined?

Bell stage (D) Signup and view all the answers

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Questions and Answers

Branchial arches

Derivatives of ectoderm include

During embryology the blastocyst

Neural crest cells give rise to

Select correct answer regarding development of tongue

This branchial arch does not give rise to any structures

The branchial arches innervated by Glossopharyngeal nerve are

The derivatives of these branchial arches are innervated by trigeminal nerve

Development of face begins at

The development of the secondary palate

The face begins to form from which process

The muscular derivatives of these branchial arches are the muscles of facial expression

The philtrum forms

Which branchial arch gives rise to mandible

Cleft palate is a development anomalie that results from

Duing childhood development, at age 4, environmental factors such as too much fluoide, can disrupt the amelogenesis process for permanent teeth.

Ameloblasts form conical projections called Tomes Processes during which of the following stages of amelogenesis:

Differentiation of ameloblasts from pre-ameloblasts takes place in which of the following stages of tooth development?

Enamel, gingiva and the skin are direct derivatives of the ectoderm.

During amelogenesis which cellular layer of the enamel organ collapses to allow for space for the ameloblasts:

During fetal development, amelogenesis for all primary teeth is completed before birth:

During odontogenesis, the dental sac gives rise to:

Cleft palate develops when there is a failure of fusion of which structures?

Odontogenesis starts with the following cellular layers at its initiation stage:

Select the single best answer:

Select the single best answer:

The origin of the dento-gingival junction is the:

The lifecycle of the ameloblast is:

The long junctional epithelium originates from:

The morphology of the tooth crown starts to be determined at which stage of development:

The prevalence of cleft lip and palate in the UK is approximately 1 in 700 live births:

The lifecycle of the odontoblast:

Which branchial arches do the muscles of mastication derive from?

Which cellular layer of the enamel organ shrinks during amelogenesis to allow for space for the ameloblasts?

Which two cellular layers are present at the dental lamina stage of tooth development?

Which stage of tooth development is the morphology of the tooth crown determined?

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