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Neurulation and Neural Crest Cells

Learn about the process of neurulation starting with the development of the notochord and the formation of the neural plate, which eventually leads to the creation of the neural tube. Explore how the neural crest cells give rise to various structures like enteric neurons and glia. Discover common abnormalities like anencephaly and encephalocoele that can occur during neurulation.

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@EvocativeShofar
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Questions and Answers

What is the initial event that marks the beginning of neurulation?

Development of the notochord

Which structure arises from the neural plate border during neurulation?

Neural crest cells

What complication arises when there is a failure to close the caudal neuropore at day 26?

Spina bifida

During neurulation, what do the mesodermal growth factors stimulate the ectoderm to form?

<p>Neuroectoderm</p> Signup and view all the answers

What is formed by the involution of the neural plate during neurulation?

<p>Neural tube</p> Signup and view all the answers

Which critical period of development includes the formation of brain, heart, eyes, ears, limbs, and external genitalia?

<p>Week 5-8</p> Signup and view all the answers

What is the correct sequence of stages during embryonic development starting from the blastocyst stage?

<p>Compaction -&gt; morula -&gt; implantation &amp; embryonic disc formation -&gt; gastrulation -&gt; neurulation</p> Signup and view all the answers

Which part of the blastocyst will facilitate implantation and placenta formation?

<p>Outer cell mass (trophoblast)</p> Signup and view all the answers

What structures form the bilaminar disc during embryonic development?

<p>Epiblast &amp; hypoblast</p> Signup and view all the answers

What is the main difference between the epiblast and hypoblast in the bilaminar disc?

<p>Epiblast develops into the embryo while hypoblast forms the yolk sac.</p> Signup and view all the answers

What is the role of the morula in embryonic development?

<p>Forms the blastocyst</p> Signup and view all the answers

Which process includes the formation of the amniotic cavity within the bilaminar disc?

<p>Gastrulation</p> Signup and view all the answers

During which embryonic stage do bronchioles develop?

<p>Canalicular stage</p> Signup and view all the answers

What is the term for the outgrowth of foregut that eventually forms the trachea and bronchial buds?

<p>Respiratory Diverticulum</p> Signup and view all the answers

What is the role of surfactant in the lungs?

<p>Aids in keeping alveoli open</p> Signup and view all the answers

What occurs if there is not enough surfactant present in the lungs of a newborn?

<p>Alveolar collapse</p> Signup and view all the answers

At what stage of embryonic development does the production of adequate surfactant usually occur?

<p>Term Stage</p> Signup and view all the answers

Where does surfactant synthesis occur in the alveoli?

<p>Type II pneumocytes</p> Signup and view all the answers

During gastrulation, where do the epiblast cells migrate through?

<p>Primitive streak</p> Signup and view all the answers

Which layer is formed when the hypoblast is replaced by epiblast cells?

<p>Endoderm</p> Signup and view all the answers

What is the role of the trophoblast during development?

<p>Forms extraembryonic mesoderm</p> Signup and view all the answers

Which structure contains the fluid where the embryo will float?

<p>Extraembryonic coelom</p> Signup and view all the answers

Which layer of the trilaminar embryo gives rise to structures like the skeleton, muscles, and heart?

<p>Mesoderm</p> Signup and view all the answers

What is formed when the bilaminar disc transforms into a trilaminar disc during gastrulation?

<p>Three germ layers</p> Signup and view all the answers

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