Development of the Nervous System

At what stage of development are the three germ layers formed?

• Cleavage

• Blastulation

• Gastrulation

• Organogenesis

What is the primary structure through which epiblast cells migrate during gastrulation?

• Neural groove

• Primitive streak

• Notochord

• Somites

Which germ layer forms the nervous system?

• Endoderm

• Mesoderm

• Ectoderm

• Hypoblast

What structure is formed by epiblast cells displacing the hypoblast during gastrulation?

• Mesoderm

• Endoderm

• Neural plate

• Ectoderm

What is the role of the notochord in embryonic development?

• Formation of somites

• Neural tube closure

• Apoptosis regulation in neural structures

• Formation of Vertebra column

During an embryology class, Thomas learned about a condition that results from the failure of the cranial neural tube to close. Which of these best describes this condition?

• Spina bifida

• Anencephaly

• Hydrocephalus

• Lissencephaly

Grace is studying different types of spina bifida for and read about the mildest form of spina bifida. Which is it?

• Meningocele

• Myelomeningocele

• Myeloschisis

• Occulta

The closure of the rostral neuropore leads to the formation of which primary brain vesicles?

• Telencephalon, diencephalon, myelencephalon

• Prosencephalon, mesencephalon, rhombencephalon

• Telencephalon, diencephalon, mesencephalon

• Mesencephalon, metencephalon, myelencephalon

What brain condition involves disruptions in neural migration resulting in a smooth brain?

• Hydrocephalus

• Spina bifida

• Lissencephaly

• Myelomeningocele

Which structure is an adult derivative of the notochord?

• Intervertebral discs

• Vertebral column

• Nucleus pulposus

• Meninges