EARLY DEVELOPMENT OF THE NERVOUS SYSTEM

Question 1

Before the formation of the nervous system in the embryo 3 main cell layers differentiate

Answer 1

Endoderm
Mesoderm
Ectoderm

Question 2

Question 3

Endoderm

Answer 3

Innermost cell layer
Gives ride to the GIT, lungs and liver

Question 4

Mesoderm

Answer 4

Middle cell layer
Gives rise to muscle, connective tissue and vascular system

Question 5

Ectoderm

Answer 5

Outermost layer
Composed of columnar epithelium
Gives rise to the entire nervous system

Question 6

Answer 6

Question 7

Neural crest cells
are a

Answer 7

strip of ectodermal cells that bud off from the lateral margins of the neural plate during the formation of the neural tube

Question 8

Neural crest cells are located

Answer 8

between the neural tube and surface ectoderm

Question 9

Neural crest cells eventually migrate

Answer 9

ventrolaterally on each side of the neural tube

Question 10

Neural crest cells will differentiate into cells of

Answer 10

Posterior root ganglia
Sensory ganglia of the cranial nerves Autonomic ganglia
Cells of the suprarenal medulla Melanocytes
Potentially also give rise to mesenchymal cells in the head and neck

Question 11