Transcript Hydrocephaly - WordPress.com

1. Which of the following is true regarding the
change in membrane potential (MP) during
hyperpolarization:
a) The MP is not changed.
b) The MP becomes more negative.
c) The major cause of the change in MP
is the active pumping of sodium ions
into the cell.
d) A possible cause of the change in MP
is the influx of chloride ions.
e) Both b and d are correct.
2. Which of the following is the
division of the PNS that arises from
four of the cranial nerves?
a)
b)
c)
d)
The autonomic nervous system.
The central nervous system.
The somatic nervous system.
The parasympathetic nervous
system.
e) The sympathetic nervous system.
3. The least numerous structural type of neuron
is:
a)
b)
c)
d)
e)
multipolar
bipolar
sensory
b and c only
None of the above.
4. The Neuroglial cell that would possibly be
found in the gray matter of the CNS is:
a) Microglial cells.
b) Schwann cells
c) Oligodendrocytes.
d) Chondrocytes.
e) Satellite cells
5. Name the region at the arrow:
a) Dendrite
b) Axon hillock
c) Synaptic cleft
d) Terminal bouton
e) Nissl body
6. Name the organelle that is involved in protein
synthesis within the soma of this cell.
a) Vesicle
b) Mitochondrion
c) Nissl bodies
d) Centrioles
e) None of the above.
7. An inhibitory post-synaptic potential would
possibly:
a) involve the blockage of chemicallygated ion channels.
b) involve the opening of voltage-gated
sodium channels.
c) bring the neuron closer to firing.
d) both a and c.
e) both b and c.
8.
Temporal summation involves:
a) several synaptic knobs releasing
neurotransmitters repeatedly in rapid
succession.
b) many sensory neurons receiving info from the
environment at once.
c) another name for depolarization.
d) a large number of synaptic knobs releasing
neurotransmitters at once.
e) None of the above.
9. Which of the following Neuroglial cells are
responsible for recapturing neurotransmitters
within the CNS?
a)
b)
c)
d)
e)
Microglial cells
Ependymal cells
Astrocytes
Oligodendrocytes
Satellite cells
10. Which of the following is/are not
multipolar, but are found near the spinal
cord?
a) All sensory neurons except the retina and
olfactory neurons.
b) All motor neurons.
c) All association neurons.
d) The neurons of the retina and olfactory area.
e) Both b and c.
11. (A) What would be myelinating this structure if it were
found within an ascending tract? Oligodendrocytes (B) What
ascending tract would be carrying pressure detected by Pacinian
Corpuscles within the hand? Lateral Spinothalamic Tract
12. What is the term used
to describe the indicated
(“X”) surface? AND
Give the general name
for the portion of the
nervous system where
this surface would be
found.
“X” Neurilemma in the PNS
13. Name the phagocytic support cell that would be found in
this location (Microglial cells) AND name the specific CNS
structure that the impulses from this neuron would arise from if
a “fight or flight” response begins. (Lateral horn of spinal cord)
14. Identify the “naked” area at the arrow (Node of
Ranvier) AND name the specific part of this neuron
that initiates the “all–or-none” action potential that
propagates along this axon .(Axon Hillock)
15. Identify this entire
structure at “a”. Fascicle
“a”
16. Identify the connective
tissue layer at “b” and name
what it compartmentalizes
in the PNS . Epineurium
and Nerve bundle
“b”
17. “A” is the nucleus of what
support cell? Schwann
AND Give one specific reason
why organelle “B”
is so abundant within the
axon. Na+/ K+ pump for
Repolarization, …
“A”
“B”
18. These are ependymal cells of the CNS. What ventricle of the
brain is found at the center of the diencephalon where these
cells would be found (3rd ventricle) AND give the name of the
CSF-producing structure that they sit on the surface of in the
ventricles? (Choroid Plexus)
19. Diagnose (Classify) the large cell indicated in this slide
(Multipolar motor neuron) AND name the specific CNS
structure where its action potentials would arise from if it
propagated along somatic pathways toward skeletal muscle.
(ventral horn of gray matter)
20. (a) What is the function of the indicated cell?
(Oligodendrocyte = myelination)
(b) Where is the indicated cell specifically found within
the CNS? (white matter or columns of the brain and spinal
Cord)
A
B