Vetan Topic 5

Question 1

What are basic functional units of the Central Nervous System?

Answer 1

neurons or nerve cells

Question 2

part of neuron which contains cytoplasm and nucleus

Answer 2

nerve cell body

Question 3

part of neuron that conducts impulses away from the cell body

Answer 3

axon

Question 4

these are tiny branches where impulses leave the neuron

Answer 4

telodendria

Question 5

neuron w/ many processes (one axon & many
dendrites)

Answer 5

multipolar neuron

Question 6

neuron w/ two processes (axon & dendrite)

Answer 6

bipolar neuron

Question 7

neuron w/ only one process (axon only)

Answer 7

unipolar neuron

Question 8

Enlarged cranial portion of the neural tube becomes?

Answer 8

the brain

Question 9

Neural canal becomes the? (2)

Answer 9

ventricles of the brain
central canal of the spinal cord

Question 10

these structures are derived from neural crest cells (5)

Answer 10

a. neurons of PNS
b. neurolemocytes (Schwann cells) of the PNS
c. adrenal medulla cells
d. melanocytes of skin
e. a variety of structures in the face.

Question 11

failure of cerebellum to develop due to
destruction of cerebellar cortex

Answer 11

Cerebellar hypoplasia and atrophy

Question 12

premature degeneration of Purkinje cell layer of
cerebellar cortex

Answer 12

Cerebellar abiotrophy

Question 13

accumulation of excessive amount of cerebrospinal fluid in the
cranial cavity

Answer 13

hydrocephalus

Question 14

thin walled and greatly enlarged lateral ventricle filled with CSF

Answer 14

hydranencephaly

Question 15

the failure of vertebral arches to close dorsal to spinal cord

Answer 15

spina bifida

Question 16

protrusion of the meninges through an opening in the vertebral arches to form a cyst beneath the skin

Answer 16

Meningocoele

Question 17

cleft in the neural tube brought about by the failure of this part to close during neurulation

Answer 17

Myeloschisis

Question 18

reduced or absence of development of one or
more segments of spinal cord.

Answer 18

hypoplasia

Question 19

dilation of central canal due to excess accumulation of CSF

Answer 19

hydromyelia

Question 20

abnormal cavitation of the spinal cord

Answer 20

Syrinomyelia

Question 21

2 spinal cords develop beside each other usually in one set or meninges and in one vertebral canal.

Answer 21

Diplomyelia

Question 22

2 spinal cords develop w/ a partition between them. Usually in separate vertebral canals and have separate meninges.

Answer 22

Diastematomyelia

Question 23

fate of the neural canal

Answer 23

become the spinal cord