Deck 11: Nervous System

Question 1

Complete failure of the neural tube to close in the region of the spinal cord is termed ________________.

A)Spina bifida occulta
B)Meningocele
C)Cranioschisis
D)Rachischisis
E)Hydrocephalus

Answer 1

D

Question 2

The bulge in a myelomeningocele contains the ___________________.

A)Spinal cord
B)Arachnoid layer
C)Subarachnoid space
D)All of the above
E)None of the above

Answer 2

D

Question 3

?The alar plate is most closely associated with which function of the central nervous system?

A)Motor
B)Sympathetic
C)Sensory
D)Parasympathetic
E)None of the above

Answer 3

C

Question 4

The cell bodies of the motor neurons of a spinal nerve arise from the _____________.

A)Basal plate
B)Marginal zone
C)Floor plate
D)Roof plate
E)Alar plate

Question 5

The floor plate of the spinal cord arises as the result of an induction by the ____________.

A)Notochord
B)Neural crest
C)Dorsal aorta
D)Dorsal part of somites
E)Overlying ectoderm

Question 6

The cerebellum arises from the ________________.

A)Prosencephalon
B)Diencephalon
C)Mesencephalon
D)Metencephalon
E)Myelencephalon

Question 7

What molecule produced by the notochord is instrumental in inducing the floor plate of the neural tube?

A)Hoxa-5
B)Retinoic acid
C)Acrosin
D)Hyaluronic acid (haluronin)
E)Sonic hedgehog

Question 8

The cauda equina develops during the second and third trimesters of fetal development as a consequence of _______________.

A)Slower growth of the spinal cord relative to the vertebral column
B)Resorption of the tail that develops in a fetus during the first trimester
C)Accelerated growth of the thoracic segments
D)Formation of the lower limbs

Question 9

A growth cone would be most likely to respond specifically to _______________.

A)Hoxb-4
B)Sonic hedgehog
C)Wnt-7a
D)Semaphoring
E)Bone morphogenetic protein-4

Question 10

The cell bodies of sensory neurons arise from the ______________.

A)Alar plate
B)Basal plate
C)Floor plate
D)Roof plate
E)Neural crest

Question 11

A young patient with a tuft of hair over the lumbar region of the vertebral column is operated on for a congenital anomaly in that region.During surgery,it was found that the dura and arachnoid layers over the spinal cord were complete,but the neural arches of several vertebrae were missing.What condition did this patient have?

A)Meningocele
B)Meningomyelocele
C)Encephalocoele
D)Rachischisis
E)Spina bifida occulta

Question 12

The cranial nerve ganglia are associated with all of the following rhombomeres except ______________.

A)r2
B)r3
C)r4
D)r6
E)r7

Question 13

A molecule that repels the advance of a growth cone is called _______________.

A)Netrin
B)Acrosin
C)Cadherin
D)Semaphoring
E)Laminin

Question 14

The first rhombomere is characterized by the expression of _____________.

A)Hoxa-1
B)Hoxb-2
C)Otx-2
D)Sonic hedgehog
E)None of the above

Question 15

Growth cones adhere strongly to a substrate containing _______________.

A)Acetylcholine
B)Epinephrine
C)Norepinephrine
D)Laminin
E)Sonic hedgehog