Ch. 13 Brain and Cranial Nerves

1.  The central nervous system develops from a flat mass of tissue called the neural  

• groove

• tube

• plate

• crest

• fold

2.  The cerebrum develops from the embryonic region called the  

• telencephalon

• mesencephalon

• diencephalon

• metencephalon

• rhombencephalon

3.  From which germ layer does the nervous system form?  

• endoderm

• mesoderm

• exoderm

• ectoderm

4.  What structures are formed from neural crest cells?

•   sensory, autonomic, and enteric neurons

• pigmented body cells

• adrenal medulla

• facial bones

• All of the choices form from neural crest cells

5.  From which embryonic brain region does the cerebellum form?  

• telencephalon

• diencephalon

• mesencephalon

• metencephalon

• myelencephalon

6.  From which embryonic brain region does the medulla oblongata form?  

• telencephalon

• diencephalon

• mesencephalon

• metencephalon

• myelencephalon

7.  What do the cavities of the neural tube become in the adult brain?

•   subarachnoid space

• ventricles

• auricles

• coelom

8.  Which of the following statements concerning the brainstem is true?  

• The brainstem consists of the medulla, pons, and cerebellum.

• The brainstem is responsible for higher level thinking skills.

• Damage to the brainstem is usually fatal.

• All twelve cranial nerves enter or exit from the brainstem.

• The brainstem is a relay for sensory input.

9.  In the CNS, clusters of gray matter containing cell bodies are called

•   nuclei.

• pyramids.

• tracts.

• peduncles.

• ganglia.

10.  The fact that the right side of the brain controls the left side of the body is explained by the  

• division of the cerebrum into two hemispheres.

• division of the cerebellum into two hemispheres.

• decussation of the pyramids in the medulla.

• need for contra-lateral control of body function. E.  brainstem being below the midbrain.