Anatomy Chapter 12, 13, 14, 15, 16

20 Questions  I  By Jan.p1127
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A somatic motor neuron carries

  
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  • 1. 
    A somatic motor neuron carries
    • A. 

      Information to signal visceral organ muscle contraction

    • B. 

      Information such as pain from the visceral in the ventral cavity to the CNS

    • C. 

      Motor commands to the skeletal muscles

    • D. 

      Information from the skin to the CNS


  • 2. 
    Most synapses are found in the:
    • A. 

      The CNS

    • B. 

      Ganglia

    • C. 

      White matter

    • D. 

      The PNS


  • 3. 
    Which of the following is NOT a characteristic of neurons
    • A. 

      Longevity

    • B. 

      Inability to divide

    • C. 

      High metabolic rate

    • D. 

      Ability to survive without oxygen


  • 4. 
    Ganglia represent groups of:
    • A. 

      Axons

    • B. 

      Dendrites

    • C. 

      Neuron body cells

    • D. 

      Synapses


  • 5. 
    The majority of neurons in the body are:
    • A. 

      Multipolar

    • B. 

      Bipolar

    • C. 

      Unipolar

    • D. 

      Pseudunipolar


  • 6. 
    Which of the following structures is found only in the PNS and not in the CNS
    • A. 

      A tract

    • B. 

      White matter

    • C. 

      A ganglion

    • D. 

      Gray matter


  • 7. 
    Interneurons are found only in the:
    • A. 

      Visceral nervous system

    • B. 

      CNS

    • C. 

      PNS

    • D. 

      ANS


  • 8. 
    Which cells provide the myelin sheaths for the neurons in the CNS
    • A. 

      Schwann cells

    • B. 

      Astrocytes

    • C. 

      Microglial cells

    • D. 

      Oligodendrocytes


  • 9. 
    Which of the following is the correct order of the components in a reflex arc:
    • A. 

      Receptor, sensory neuron, integration center, motor neuron, effector

    • B. 

      Effector, sensory neuron integration center, receptor, motor neuron


  • 10. 
    White matter represents
    • A. 

      Aggregations of cell bodies in the brain

    • B. 

      Aggregations of neuron cell bodies in the spinal column

    • C. 

      Myelinated axons traveling together in the CNS


  • 11. 
    Action potentials travel along the
    • A. 

      Axon membrane

    • B. 

      Dendrite membrane

    • C. 

      Cell body

    • D. 

      Satelitte


  • 12. 
    The peripheral nerve fibers that would measure the degree of stretch in a the biceps brachii muscle and its tendons would be an example of a:
    • A. 

      General somatic sensory

    • B. 

      General somatic motor

    • C. 

      General visceral motor

    • D. 

      Special visceral sensory


  • 13. 
    All of the following are characteristics of the dendrites except that they
    • A. 

      Have more extensive branching than axons

    • B. 

      Always conduct action potentials

    • C. 

      Conduct signals towards the cell body


  • 14. 
    Myelin on axons functions to:a. make axons live longer             b. store nutrients (fat) for use of the neuronc. cover the nodes of Ranvier     d. speed  the rate of impulse conduction and insulate the axon
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      D


  • 15. 
    Unmyelinated axons area. thicker than myelinated axons       b. are not associated with Schwann cellsc. conduct impulses more slowly than myelinated axons     d. occur the PNS only
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      D


  • 16. 
    Which of the following immediately encloses a single neuron?a. endoneurium         b. perineurium                  c. fascicle             d. indoneurium
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      D


  • 17. 
    A man walking barefoot steps on a piece of glass. His foot jerks upwards in which type of reflexa. somatic, polysynaptic, withdrawal       b. visceral, monosynaptic, stretchc. somatic, monosynaptic, withdrawal    d. visceral, polysynaptic, withdrawa
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      D


  • 18. 
    Gray matter in the CNS contains all of the following excepta. neuronal cell bodies         b. neuroglia        c. dendrites        d. fiber tracts
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      D


  • 19. 
    The chemical substance that is released at the axon terminal is called aa. hormone        b. neurotransmitter        c. synaptic vesicle            d. nissl body
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      D


  • 20. 
    In the spinal cord, the cell bodies of most interneurons line in thea. sensory ganglia       b. PNS   c. dorsal half of gray matter         d. ventral half of white matter
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      D


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