Cycle 1, Somites
Somite Structure and Development Quiz
Test your knowledge on the formation and characteristics of somites, sclerotomes, dermomyotomes, and more in this comprehensive quiz! Answer questions about the essential roles of mesoderm and mesenchyme in embryological development.
- Learn key concepts about somitogenesis
- Understand the differences between various mesodermal structures
- Challenge your knowledge with fact-based questions
What is true about the sclerotome?
Is derived from ventro-medial somite cells.
Cells before becoming a sclerotome undergo epithelial transformation. Contains only epithelial like cells.
Sclerotome gives rise to mesenchyme
Sclerotome gives rise to mesoderm
Sclerotome gives rise to dermis and scletelat muscles
Contains secondary mesenchymal cells.
Contains only epitheal like cells
What is true about somites?
They are blocks (segments) of the paraxial mesoderm
They develop from the tail towards the cranial region.
They develop from the cranial towards the caudal region.
None of them disappear.
They are blocks (segments) of the visceral mesoderm.
They are blocks (segments) of the lateral mesoderm.
They are symmetrical structures.
They appear between the 20th and 35th day of prenatal life
What is true about the mesenchyme?
Is located between the ectoderm and endoderm.
Appears only during the prenatal life.
Is called 4th germ layer.
Is located above the ectoderm.
Is located in mesoderm.
Appears at every stage of life.
Is one of the three germ layers
Is derived from mesoderm
What is true about the mesoderm?
Is derived from mesenchyme.
Is located between the ectoderm and endoderm.
Appears only during the prenatal life.
Is one of the three germ layers
Is located between the mesenchyme and endoderm.
Is located above the ectoderm.
Is called 4th germ layer
What is true about somitogenesis?
Leads to the formation of somites and somitomers.
It is regulated by the so-called segmentation and wave front model
The final number of somites is approximately 38 pairs.
It occurs after the initiation of neurulation.
It happens before the initiation of neurulation
Starts during the beginning of the 3rd week of prenatal life.
It is the process of segmentation of the extraembryonic mesoderm
It is the process of segmentation of the paraxial mesoderm
It’s a sequential process - somitomers and somites arise one after the other
Somitomers and somites are formed at long intervals of time
It begins at the beginning of the 3rd month of prenatal life.
What is true about somitomers?
Appear around 3rd week of perinatal life
Are located on one side along the neural tube
Somitomeres are involved in the segmentation of the neutral plaque, the production of neuromeres
Are located below the occipital region of the head
What is true about the dermomyotome?
Is so called lateral mesoderm
Is so called paraxial mesoderm
It is a dorsolateral part of the somite
Will differentiate into a myotome and dermatome
It’s created after separation of myotome and dematome
Its cells can migrate
Its cells can’t migrate.
What is true about the dermatome?
Dermatome cells are differentiated from dermomyotome
Is a structure located closer to the ectoderm in developing embryo.
It will soon contribute to the development of the skeletal muscles.
Dermatome progenitors together with the cells from the lateral mesoderm will form an epidermis
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