Practice Questions on the Nervous System
Page 1

  1. Which of the following statements is TRUE?
    1. Peripheral nerve is similar to smooth muscle in terms of the connective tissue investment
    2. Most nerves contain afferent and efferent fibers and thus carry both motor and sensory signals
    3. Nodes of Ranvier are most easily seen in cross-section of peripheral nerve
    4. None of the above

  2. Which of the following cells is reponsible for myelin formation in the peripheral nervous system?
    1. Astrocyte
    2. Oligodendrocyte
    3. Schwann cell
    4. Microglial cell
    5. Satellite cell

  3. The perineurium is the connective tissue layer:
    1. Surrounding an entire nerve
    2. Surrounding individual axons in the CNS
    3. Surrounding individual axons in the PNS
    4. Surrounding fascicles of axons in the CNS
    5. Surrounding fascicles of axons in the PNS

  4. The peripheral nervous system includes the:
    1. Somatic nervous system
    2. Brain
    3. Spinal cord
    4. Nuclei

  5. The system that controls smooth muscle, cardiac muscle, and gland activity is the:
    1. Somatic nervous system
    2. Autonomic nervous system
    3. Skeletal division
    4. Sensory nervous system

  6. A neuron with many short dendrites and a single long axon is a:
    1. Multipolar neuron
    2. Bipolar neuron
    3. Unipolar neuron
    4. None of the above

  7. Most sensory neurons are _____________________ neurons.
    1. Unipolar
    2. Bipolar
    3. Multipolar
    4. Efferent
    5. A and b
    6. A and c
    7. B and c

  8. Cells found in the choroid plexus that secrete cerebrospinal fluid are:
    1. Astrocytes
    2. Microglia
    3. Ependymal cells
    4. Oligodendrocytes
    5. Schwann cells

  9. The most likely type of fiber that would carry the impulse for a withdrawal reflex would be a(n):
    1. A fiber because they carry the strongest action potentials
    2. A fiber because they carry APs the fastest
    3. B fiber because they carry APs the fastest
    4. C fiber because they carry the strongest APs

  10. Axons within nerves may have which of the following associated with them?
    1. Schwann cells
    2. Nodes of Ranvier
    3. Oligodendrocytes
    4. A and b
    5. All of the above

  11. Action potentials are conducted more rapidly in:
    1. Small diameter axons than large diameter axons
    2. Large diameter axons than small diameter axons
    3. Unmyelinated axons than myelinated axons
    4. Axons that lack a wrapping of Schwann cells

  12. Clusters of nerve cell bodies within the PNS are called ____________________.
  13. Gray matter contains primarily:
    1. Myelinated fibers
    2. Neuron cell bodies
    3. Schwann cells
    4. All of the above

  14. Arrange the following connective tissue structures from the outermost to the innermost.
    1. Endoneurium
    2. Epineurium
    3. Perineurium

  15. Neurotransmitters are stored in vesicles that are located primarily in specialized portions of the:
    1. Soma
    2. Axon
    3. Dendrite
    4. Perikaryon

  16. An inhibitory neuron could affect the neuron with which it synapses by:
    1. Producing an IPSP within the neuron
    2. Hyperpolarizing the neuron
    3. Increasing K+ efflux from the neuron
    4. Increasing Cl- influx into the neuron
    5. All of the above
    6. 2 of the above

  17. Summation:
    1. Is caused by a combining of several local potentials
    2. Can occur when 2 action potentials arrive simultaneously at 2 different presynaptic terminals
    3. Can occur when 2 action potentials arrive in very close succession at a single presynaptic terminals
    4. All of the above

  18. Which of the following organelles is responsible for the appearance of Nissl bodies in the cell bodies of motor neurons?
    1. Smooth endoplasmic reticulum
    2. Rough endoplasmic reticulum
    3. Golgi apparatus
    4. Mitochondria
    5. Basal bodies

  19. Which of the following structures is a component of a reflex arc?
    1. Afferent neuron
    2. Efferent neuron
    3. Sensory receptor
    4. Effector organ
    5. All of the above

  20. A convergent circuit:
    1. Is a positive feedback system that produces many action potentials
    2. Is a negative feedback system that produces IPSPs
    3. Occurs when multiple neurons synapse onto few neurons
    4. Cannot be affected by a sodium channel blocker
    5. All of the above

  21. The output of a convergent circuit could be:
    1. An IPSP
    2. An EPSP
    3. An action potential
    4. All of the above

  22. Which of the following is TRUE of the perineurium?
    1. It's a fascia surrounding many bundles of nerve fibers
    2. It's a layer of connective tissue surrounding a singl bundle (fascicle) of nerve fibers
    3. It's a thin layer of reticular fibers covering individual nerve fibers
    4. It's an artery-rich fascia covering the external coat of nerves

  23. Which of the following is TRUE of the sympathetic nervous system?
    1. It's voluntarily controlled via the forebrain
    2. It's voluntarily controlled via the reticular formation
    3. It uses different neurotransmitters at the ganglion and at the synaptic cleft
    4. It's a subdivision of the somatic nervous system

  24. Santiago Ramon y Cajal proposed that neurons were dynamically polarized. By this he meant that excitation only spread in one direction along a neuron. In which part of the neuron did he imagine that the excitation began and in which direction did it spread?
  25. Can neuroglial cells transmit action potentials from one nerve cell to another?
  26. What is the difference between grey and white matter of the CNS?
  27. What are the events whose frequency is being modulated to transmit information through the nervous system?

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