Neurulation

Question 1

Is the fifth and last stage of early embryonic development

Answer 1

Neurulation

Question 2

Neurulation characterize by the following:

Answer 2

1. Formation of the central nucleus system
2. Formation of the head process
3. The initial development of the gut
4. Formation of somite
5. Initial development of the heart

Question 3

Is the result of the thickening of the surface ectodermal cells along the dorsal midline of the embryonic disk overlying the notochord

Answer 3

Neural plate

Question 4

The neural plate becomes depressed to form

Answer 4

Neural groove

Question 5

The edges of the neural plate becomes raises or elevated to form

Answer 5

Neural folds

Question 6

Fuse dorsally to form the _______ with a lumen (______) and wall (_________).

Answer 6

Neural tube
Neural canal
Neuroepithelium

Question 7

The extreme anterior and posterior ends of the neural tube ramain open and are termed __________ and _______ respectively.

Answer 7

Anterior neuropore, posterior neuropore

Question 8

Proliferate and assume a position dorsolateral to the neural tube to form the

Answer 8

Neural crest

Question 9

Those in the head region form mesenchyme (___________) that becomes the meninges, bone, fascia and teeth.

Answer 9

Ectomesenchyme

Question 10

During the formation of the neural tube, the cephalic region of the embryo begins to elevate above the surface of the embryonic disk and elongate rostrally to form the

Answer 10

Head process

Question 11

The first gut tube that is formed is the

Answer 11

Foregut

Question 12

Most rostral tip eventually becomes the

Answer 12

Pharynx

Question 13

At this stage of development the foregut opens caudally into the ____________ ( in birds) and _________( in mammals) through the cranial (anterior) intestinal portal.

Answer 13

Subgerminal cavity, archenteron

Question 14

Rostral to the notochord, mesenchyme forms less developed somites called

Answer 14

Somitomeres

Question 15

Migrate to form the skin dermis

Answer 15

Dermatome

Question 16

Forms most of the axial skeleton: vertebrae, ribs and bone of the skull

Answer 16

Sclerotome

Question 17

Forms skeletal musculature

Answer 17

Myotome

Question 18

Two endocardial tubes fuse to form a single….

Answer 18

Cardiac tube

Question 19

The fused endocardial tubes and cardiogenic plates become the

Answer 19

Cardiac tube

Question 20

____________Which is derived from the cardiogenic plates and the endocardium derived from the endocardial tubes

Answer 20

Epimyocardium

Question 21

The paired caudal extension are the R an L…

Answer 21

Omphalomesenteric or vitelline veins

Question 22

Transition from a flat embryo to a cylindrical one involves the following:

Answer 22

• Formation of the head fold
• Formation of tail fold
• Formation of lateral body folds