Histology 1E
Histology and Development Quiz
Test your knowledge on the intricate world of histology and embryonic development with our comprehensive quiz. Dive into topics like somites, mesoderm, and somitogenesis, and explore their critical roles in human development.
Whether you're a student, educator, or just a curious mind, this quiz will challenge your understanding with questions focused on:
- Mesoderm formation
- Somite development
- Dermatome and dermomyotome fun
ctions - Role of nodal cilia
Somites
Occurs after the initiation of neurulation
Happens before the initiation of neurulation
Develop from cranial towards caudal region
None of them dissapear
They appear between the 20th and 35th day of prenatal life
They are symmetrical structures
They are blocks of the paraxial mesoderm
Establish the segmental organization of the body
The place of differentiation from the paraxial mesoderm is called the presomic region
Derive from somitomeres of the paraxial mesoderm
What is true about the mesoderm?
Is one of the three germ layers
Is located above the ectoderm
Is called the 4th germ layer
Is derived from mesenchyme
Appears only during prenatal life
Intraembryonic is located between the ectoderm and endoderm
Paraxial is divided into: dermatome, myotome and sclerotome
Cornea develops from the intermediate mesoderm
Mesenchyme develops from sclerotome
Intermediate divides into: dermatome, myotome and sclerotome
What is true regarding the dermatome?
Dermatome progenitors togheter with cells from the lateral mesoderm will form the dermis
Dermatome cells are differentiated from the dermomyotome
Is a structure located closer to the ectoderm in the developming embryo
Dermatome progenitors together with cells from the lateral mesoderm will form the epidermis
Is the structure located closer to the neural tube in the embryo
Dermatome cells are differentiated from the myotome
It will soon contribute to the development of the skeletal muscles
What is true regarding the dermomyotome?
Its cell can migrate
Is created after separation of the myotome and dermatome
Is also called the lateral mesoderm
It is a dorsolateral part of the somite
It is a ventrolateral part of the somite
What is correct regarding mesenchyme?
Is derived from the mesoderm
Is located between the ectoderm and endoderm
Is located between the mesenchyme and endoderm
Is called the 4th germ layer
Is located in the mesoderm
What is true regarding somitogenesis?
Happens before the initiation of the neurulation
Begins at the beginning of the 3rd month of prenatal life
Occurs after the initiation of neurulation
It is regulated by so-called segmentation and wave model
Somitomers and somites are formed at long intervals of time
It begins ≈ day 19-21
What is true about somitomers?
Consists of mesodermal cells
Are arranged in concentric coils around their own center
Located on both sides along the neural tube
Are derived from the loose masses of the paraxial mesoderm
� 50 pairs of somitomers in the human embryo
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