SCB 204.1738, 1739
Quiz 1
FORM A
Robyn O’Kane, Ph.D.
Spring I 2008
Name_________________________________________________________________
1. Glutamate and aspartate
A. act within the CNS
B. are excitatory amino acids.
C. stimulate the opening of calcium channels.
D. All of the above are correct.
2. Opioid peptides
A. transmit pain information from the PNS to the CNS.
B. are also called biogenic amines.
C. are analgesic (pain-relieving).
D. are released at neuromuscular junctions.
3. Prozac is a selective serotonin reuptake inhibitor. What does this mean?
A. Serotonin won’t be released into the synaptic cleft as quickly.
B. Serotonin will remain in the synaptic cleft for a longer period of time.
C. Serotonin will be taken up into the releasing neuron at a faster rate.
D. Serotonin will be taken up into surrounding neuroglia cells at a faster rate.
4. An effector for the sympathetic nervous system could be
A. glandular cells.
B. the heart muscle cells.
C. skeletal muscle fibers.
D. All of the above are correct.
E. A and B are correct only.
5. What part of the neuron is where information is typically received?
A. Axon
B. Dendrite
C. Cell body
D. Nissl body
6. Sensory information
A. is integrated in a posterior root ganglion.
B. travels through afferent nerves.
C. is detected by an effector.
D. directly triggers an action potential in a skeletal muscle fiber.
7. When a neuron is at rest,
A. an action potential is occurring.
B. voltage-gated Na+ channels are inactivated.
C. voltage-gated K+ channels are open.
D. there are more positive charges outside the cell than inside the cell.
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8. Which cell type is electrically excitable?
A. Schwann cell.
B. Ependymal cell.
C. Microglia cell.
D. Sensory neuron.
9. Which of the following receives information from the peripheral nervous system?
A. Effector
B. Receptor
C. Control center
D. A and B are correct.
E. A and C are correct.
10. Complex activities require one or more ______________ within the integrative
center.
A. afferent nerves
B. sensory neurons
C. interneurons
D. effectors
11. An excitatory postsynaptic potential
A. is the same thing as a hyperpolarization.
B. causes a depolarization of the transmembrane potential.
C. can be due to chloride channels opening.
D. can be due to potassium channels opening.
12. Neuron A, Neuron B, and Neuron C all synapse on the same neuron (Neuron D). If
Neuron A stimulates a 5 mV EPSP, Neuron B stimulates a 10 mV IPSP, and Neuron C
stimulates a 15 mV EPSP, what is the overall change in transmembrane potential for
Neuron D?
A. + 30 mV
B. + 5 mV
C. + 10 mV
D. – 10 mV
13. In the previous question, this is an example of
A. absolute refractory period.
B. spatial summation.
C. temporal summation.
D. depolarization during an action potential.
14. All of the following are correct about a neuron EXCEPT
A. the synaptic terminals typically contain vesicles of a neurotransmitter.
B. the cell body has a nucleus.
C. the cell membrane is a phospholipid bilayer.
D. most neurons have multiple axons.
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15. Which ion is directly responsible for triggering the exocytosis of neurotransmitter
from the synaptic terminal?
A. Sodium
B. Potassium
C. Calcium
D. Chloride
16. Which type of circuit best demonstrates the concept of spatial summation?
A. Converging
B. Series
C. Diverging
17. Most motor neurons are
A. unipolar.
B. interneurons.
C. bipolar.
D. multipolar.
18. Repolarization occurs
A. when voltage-gated K+ channels are open.
B. when voltage-gated Na+ channels are inactivated.
C. when transmembrane potential becomes less positive (more negative).
D. All of the above are correct.
E. A and B are correct only.
19. Cerebrospinal fluid is produced when fluid from the bloodstream travels through
_____________ into the brain.
A. satellite cells
B. astrocytes
C. ependymal cells
D. oligodendrocytes
E. microglial cells
20. Which neurotransmitter is not stored in vesicles, but is instead formed on demand?
A. Acetylcholine
B. Dopamine
C. Norepinephrine D. Nitric oxide
21. Sensory information traveling in the central nervous system would be in
A. ascending tracts.
B. ascending nerves.
C. descending tracts.
D descending nerves.
22. Which type(s) of neuroglial cell is required for an axon to exhibit saltatory
conduction?
A. Ependymal
B. Oligodendrocyte
C. Schwann
D. All of the above are correct.
E. B and C are correct only.
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23. After the neurotransmitter traverses (crosses) the synaptic cleft and binds to its
receptor,
A. a graded potential will typically occur.
B. a ligand-gated channel will typically open.
C. an action potential will always occur.
D. All of the above are correct.
E. A and B are correct only.
24. Which of the following is correct regarding hyperpolarization?
A. The transmembrane potential is less negative than the resting membrane potential.
B. The membrane is in a relative refractory period.
C. Voltage-gated Na+ channels are inactivated.
D. No matter how strong the stimulus is, the membrane potential will not reach threshold
and fire an action potential.
25. A graded potential is
A. what occurs after threshold is reached.
B. typically due to the opening of voltage-gated Na+ channels.
C. a repolarization.
D. what occurs when a neurotransmitter binds to a ligand-gated Na+ channel.
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