embriology
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Questions and Answers

What is the fate of the mesoderm?

  • Formation of neural tube
  • Differentiation of mesoderm (correct)
  • Formation of trilaminar disk
  • Folding of embryo

What structures do neural crest cells form?

  • Trilaminar disk
  • Pharyngeal arches (correct)
  • Bilaminar disk
  • Pouches

During which phase of the embryonic period does gastrulation occur?

  • Phase 1 (correct)
  • Phase 2
  • Phase 3
  • Phase 4

During which phase of prenatal development does gastrulation occur?

<p>Embryonic period phase 1 (A)</p> Signup and view all the answers

Which germ layer forms the bones and muscles of most of the body?

<p>Paraxial mesoderm (B)</p> Signup and view all the answers

What is the function of the notochord during gastrulation?

<p>It tells the three germ layers what to do next (C)</p> Signup and view all the answers

Which germ layer forms the urogenital system?

<p>Intermediate mesoderm (A)</p> Signup and view all the answers

Which structure is formed by the first pharyngeal pouch in humans?

<p>Ear (A)</p> Signup and view all the answers

What happens to the rest of the grooves in the pharyngeal arches?

<p>They disappear (A)</p> Signup and view all the answers

Which cranial nerve is associated with the mastication muscles?

<p>V (trigeminal) (C)</p> Signup and view all the answers

What is the fate of Meckel's cartilage in human development?

<p>It disappears (C)</p> Signup and view all the answers

Which layer of the embryo forms the lining of the gastrointestinal tract?

<p>Endoderm (A)</p> Signup and view all the answers

Which structures are derived from the 1st and 2nd pharyngeal arches?

<p>Bones and muscles of the body (except head) (D)</p> Signup and view all the answers

During lateral folding of the embryo, what happens to the endodermal layer?

<p>It bends and reaches towards each other to form the gut (B)</p> Signup and view all the answers

What does the neural tube turn into during development?

<p>Brain and spinal cord (A)</p> Signup and view all the answers

During which phase of prenatal development does gastrulation occur?

<p>Phase 1 (D)</p> Signup and view all the answers

What structures do neural crest cells form?

<p>Pharyngeal arches (B)</p> Signup and view all the answers

What is the fate of the mesoderm?

<p>Forms the bones and muscles of most of the body (A)</p> Signup and view all the answers

Which germ layer forms the urogenital system?

<p>Mesoderm (B)</p> Signup and view all the answers

What structures arise from each pharyngeal arch, groove, and cleft?

<p>Major structures (A)</p> Signup and view all the answers

What happens during week 1 and 2 of embryonic development?

<p>Formation of trilaminar disk (B)</p> Signup and view all the answers

How does the neural tube form, and what happens to it?

<p>Forms through folding of the embryo (B)</p> Signup and view all the answers

During which phase of prenatal development does the formation of the neural tube occur?

<p>Phase 2 (A)</p> Signup and view all the answers

What is the function of the notochord during gastrulation?

<p>Tells the three germ layers what to do next (D)</p> Signup and view all the answers

Which germ layer does the intermediate mesoderm give rise to?

<p>Urogenital system (C)</p> Signup and view all the answers

What structures are formed by the paraxial mesoderm?

<p>Bones and muscles of most of the body (C)</p> Signup and view all the answers

What is the fate of Meckel's cartilage in human development?

<p>Forms the bones and muscles of most of the body (A)</p> Signup and view all the answers

Which structures are derived from the 1st and 2nd pharyngeal arches?

<p>Bones and connective tissue of head (C)</p> Signup and view all the answers

What does the neural tube turn into during development?

<p>Central nervous system (A)</p> Signup and view all the answers

What is the main function of the pharyngeal arches during embryonic development?

<p>Formation of the bones and muscles of the head and neck (C)</p> Signup and view all the answers

During which phase of prenatal development does folding of the embryo occur?

<p>Embryonic period phase 2 (D)</p> Signup and view all the answers

What is the fate of the neural tube during development?

<p>It turns into the brain and spinal cord (D)</p> Signup and view all the answers

Which germ layer forms the lining of the gastrointestinal tract?

<p>Endoderm (D)</p> Signup and view all the answers

What structures are derived from the mesoderm?

<p>Bones and muscles of the back (D)</p> Signup and view all the answers

What is the main function of the notochord during gastrulation?

<p>Formation of the brain and spinal cord (C)</p> Signup and view all the answers

What is the fate of Meckel's cartilage in human development?

<p>It regresses and disappears (B)</p> Signup and view all the answers

Which structure is formed by the second pharyngeal pouch in humans?

<p>Inferior parathyroid (B)</p> Signup and view all the answers

Which cranial nerve is associated with the facial expression muscles?

<p>VII (facial) (A)</p> Signup and view all the answers

What is the fate of Meckel's cartilage in human development?

<p>Degenerates and disappears (B)</p> Signup and view all the answers

During which phase of prenatal development does cellular differentiation occur?

<p>Fetus Phase 3 (B)</p> Signup and view all the answers

What structures are derived from the 4th and 5th pharyngeal pouches?

<p>Superior parathyroid (B)</p> Signup and view all the answers

What happens to the rest of the pharyngeal grooves in human development?

<p>They disappear (C)</p> Signup and view all the answers

Which cranial nerve is associated with the mastication muscles?

<p>V (trigeminal) (C)</p> Signup and view all the answers

What is the fate of the first pharyngeal groove in human development?

<p>Disappears (C)</p> Signup and view all the answers

Which structure is formed by the third pharyngeal pouch in humans?

<p>Thymus (D)</p> Signup and view all the answers

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