Mesoderm Quiz: Difference between revisions

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+ Contribute to a single vertebral level body and the intervertebral disc.
+ Contribute to a single vertebral level body and the intervertebral disc.
- Myotomes contribute the smooth muscle associated with the gastrointestinal tract wall.
- Myotomes contribute the smooth muscle associated with the gastrointestinal tract wall.
|| Paraxial mesoderm forming the early somite does initially form a transient epithelial layer that covers each somite. This layer breakdown with later development, allowing the somite components to disperse. The sclerotome component of each somite pair engulf the left and right side of the notochord forming the entire axial column, that includes the vertebra and intervertebral disc (from each somite). Somatic not somitic mesoderm forms the body wall osteogenic, chrondrogenic and fibrogenic cells. Don't mix up somatic/somitic. You may have had to think about this as the dermatome, forming the dermis and fibrogenic cells, does mix with somatic mesoderm later in development, but does not contribute either osteogenic or chrondrogenic cells. Myotomes contribute the skeletal muscle not smooth muscle. The GIT smooth muscle comes from splanchnic mesoderm.
|| <br>Paraxial mesoderm forming the early somite does initially form a transient epithelial layer that covers each somite. This layer breakdown with later development, allowing the somite components to disperse. The sclerotome component of each somite pair engulf the left and right side of the notochord forming the entire axial column, that includes the vertebra and intervertebral disc (from each somite). Somatic not somitic mesoderm forms the body wall osteogenic, chrondrogenic and fibrogenic cells. Don't mix up somatic/somitic. You may have had to think about this as the dermatome, forming the dermis and fibrogenic cells, does mix with somatic mesoderm later in development, but does not contribute either osteogenic or chrondrogenic cells. Myotomes contribute the skeletal muscle not smooth muscle. The GIT smooth muscle comes from splanchnic mesoderm.
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Revision as of 17:39, 15 August 2016

Here are a few simple questions that relate to mesoderm development. Take the quiz and see what you know, if you get some wrong, try working through through the Embryology Lecture on Mesoderm.

Take the Quiz

1 Mesenchyme refers to the middle layer of the trilaminar embryo

true
false

2 The intraembryonic coelom forms within :

somites
lateral plate
neural tube
intermediate mesoderm

3 All paraxial mesoderm segments into somites.

true
false

4 Somites are developmental structures that contribute the following adult structures :

vertebra, notochord, dermis, skeletal muscle
vertebra, intervertebral discs, dermis, skeletal muscle
kidney, body wall connective tissue, sensory ganglia
kidney, gastrointestinal tract smooth muscle, mesentry

5 Which of the following statements about somites is/are correct:

Differentiate a covering epithelium in their early stages.
Somites contribute the body wall osteogenic, chrondrogenic and fibrogenic cells.
Contribute to a single vertebral level body and the intervertebral disc.
Myotomes contribute the smooth muscle associated with the gastrointestinal tract wall.


Quizzes

Medicine Practicals: Foundations Embryology - BGDA Fertilization to Implantation | Embryo | Fetal | Placenta - BGDB Gastrointestinal | Face and Ear | Sexual Differentiation

General Embryology: Ectoderm Quiz | Mesoderm Quiz | Early Heart Quiz | Placenta Quiz | Respiratory Quiz | Renal Quiz | Genital Quiz