ET1

Question 1

In chick, the first epiblast cells that migrate to Koller’s sickle and then move inside and under the overlying epiblast will form which type of cell?

A.
Mesoderm

B.
Ectoderm

C.
Endoderm

D.
Neuroectoderm

Answer 1

C

The first cells that move inside and under the epiblast layer will receive strong signals (e.g. Nodal) from Koller’s sickle that will turn them into endoderm.

Question 2

In frog, what cell-type migrates and moves inside the developing blastula (i.e. invaginates) at the dorsal lip of the blastopore?

A.
Endoderm

B.
Mesoderm

C.
Neuroectoderm

D.
Ectoderm

Answer 2

b

The mesoderm migrates to the dorsal lip of the blastopore and then moves inside and up under the overlying animal cap.

Question 3

In the vertebrate hindbain, which region of the neural tube gives rise to branchiomotor (a.k.a. special visceral efferent) neurones?

A. Dorsal progenitor 1 (Dp1)

B. Roof plate

C. Progenitor of motor neurones (pMN)

D. Ventral progenitor 3 (Vp3)

Answer 3

D

The branchiomotor neurones are generated in the ventral-most part of the neural tube, next to the floor plate, from the ventral progenitor 3 (Vp3) region.

Question 4

Which of the following brain structures is generated by the metencephalon?

A.
Cerebral cortex

B.
Tectum

C.
Medulla oblongata

D.
Cerebellum

Answer 4

D

The metencephalon generates the cerebellum at the dorsal side and pons at the ventral side.

Question 5

In humans, a failure of neural plate closure at the anterior (head) end causes which of the following conditions?

A.
Cyclopia

B.
Spina bifida

C.
Hydrocephalus

D.
Anencephaly

Answer 5

D

When the neural plate fails to close over the brain region remains exposed and this is a condition known as anencephaly.

Question 6

Question 8
1 out of 1 points

A.
Diencephalon

B.
Mesencephalon

C.
Telencephalon

D.
Metencephalon

Answer 6

C

The ventral part of the telencephalon forms the sub-pallium and this gives rise to the corpus striatum.

Question 7

In the spinal cord, axons traveling up the dorsal column will be carrying which of the following types of information?

A.
Temperature

B.
Pressure

C.
Pain (nociception)

D.
Fine touch

Answer 7

D

The dorsal column consists of the gracile and cuneate tracts and these contain axons that are carrying information about fine touch, proprioception and vibration.

Question 8

Which of the following brain vesicles will give rise to the midbrain?

A.
Diencephalon

B.
Myelencephalon

C.
Mesencephalon

D.
Telencephalon

Answer 8

C

The mesencephalon will form the midbrain regions of tectum and tegmentum