Oral and Craniofacial Developmental Biology: Embryonic Development Stages

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What is the source of embryonic stem cells?

Gastrulation

Sheet of cells that give rise to epi-and hypoblast (correct)

Neural plate formation

Blastocyst

Which stage of embryonic development is responsible for the formation of the neural plate?

Neurulation

Neural plate formation (correct)

Gastrulation

Ectoderm formation

Which germ layer is responsible for the development of the gut, liver, and thyroid?

Mesoderm

Neural crest

Ectoderm

Endoderm (correct)

During which stage of embryonic development do the body walls start to fold?

Folding of the body walls Signup and view all the answers

Which of the following is a derivative of the mesoderm?

Skeleton Signup and view all the answers

What is the purpose of the neural crest cells?

To migrate from the neural tube Signup and view all the answers

At what age does the fusion of the symphysis menti occur?

During childhood Signup and view all the answers

What is the origin of the tissues that form the dental pulp?

Cranial neural crest cells Signup and view all the answers

Which of the following is NOT a growth site of the mandible?

The mid-sagittal plane Signup and view all the answers

What is the name of the signal that drives tooth development?

Odontogenic signal Signup and view all the answers

During which stage of tooth development is the dental follicle formed?

Cap stage Signup and view all the answers

What is the name of the tissue that forms the enamel of the tooth?

Dental organ Signup and view all the answers

What is the outermost layer of the embryo at the end of gastrulation?

Ectoderm Signup and view all the answers

What is the anatomical structure labeled as 3 in the diagram?

Oral cavity Signup and view all the answers

Which structure grows at the same rate as the general body?

Face Signup and view all the answers

At what age is the growth of the skull almost complete?

10 years old Signup and view all the answers

What is the innermost layer of the embryo at the end of gastrulation?

Endoderm Signup and view all the answers

When is the growth of the face complete?

With the eruption of the 3rd molars Signup and view all the answers

What is the name of the structure that produces mineralized tooth tissues during the late bell stage of tooth development?

Ameloblasts Signup and view all the answers

During the early bell stage of tooth development, which of the following histological features is NOT characteristic of this stage?

Dental pulp Signup and view all the answers

What is the name of the structure that provides the outermost layer of the enamel organ during the early bell stage of tooth development?

Outer enamel epithelium Signup and view all the answers

During the late bell stage of tooth development, which of the following cells is responsible for producing dentin?

Odontoblasts Signup and view all the answers

What is the name of the structure that forms the junction between the enamel organ and the dental papilla during the early bell stage of tooth development?

Cervical loop Signup and view all the answers

During the early bell stage of tooth development, which of the following histological features is characteristic of the enamel organ?

Stellate reticulum Signup and view all the answers

What is the anatomical feature located between the upper and lower lips?

Labiomental groove Signup and view all the answers

Which of the following anatomical features is NOT located in the palate?

Gingivae Signup and view all the answers

What is the name of the process by which the shape of the bone is restored?

Bone remodelling Signup and view all the answers

Which type of cells are responsible for breaking down bone tissue?

Osteoclasts Signup and view all the answers

What is the name of the structure that separates the roots of multi-root teeth?

Interradicular septum Signup and view all the answers

What is the name of the anatomical feature located at the junction of the upper and lower lips?

Oral commissures Signup and view all the answers