A&p Muscle And Nervous System

63 Questions | Total Attempts: 142

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AP Nervous System Quizzes & Trivia

Questions and Answers
  • 1. 
    Which of the following structures is not part of the central nervous system?
    • A. 

      The brain

    • B. 

      A nerve

    • C. 

      The spinal cord

    • D. 

      A tract

  • 2. 
    Identify which type(s) of supporting cell is being described. Myelinates nerve fibers in the CNS
    • A. 

      Astrocyte

    • B. 

      Ependymal cell

    • C. 

      Microgilia

    • D. 

      Oligodendrocyte

    • E. 

      Satellite cell

    • F. 

      Schwann cell

  • 3. 
    Lines brain cavities
    • A. 

      Astrocyte

    • B. 

      Ependymal cell

    • C. 

      Satellite cell

  • 4. 
    Myelinates nerve fibers in the PNS
    • A. 

      Schwann cell

    • B. 

      Oligodendrocyte

    • C. 

      Microgilia

  • 5. 
    CNS Phagocytes
    • A. 

      Ependymal cell

    • B. 

      Microgilia

    • C. 

      Astrocyte

  • 6. 
    Helps regulate the ionic composition of CNS extracellular fluid
    • A. 

      Astrocytes

    • B. 

      Schwann cells

    • C. 

      Satellite cells

  • 7. 
    What type of current flows through the axolemma during the steep phase of repolarization?
    • A. 

      Chiefly a sodium current

    • B. 

      Chiefly a potassium current

    • C. 

      Sodium and potassium current

  • 8. 
    Assume that an EPSP is being generated on the dendritic membrane.  Which will occur?
    • A. 

      Specific Na+ channels will open

    • B. 

      Specific K+ channels will open

    • C. 

      A single type of channel will open, permitting simultaneous flow of Na+ and K+

    • D. 

      Na+ channels will open first and then close as K+ channels open

  • 9. 
    The velocity of nerve impulse conduction is greatest in
    • A. 

      Heavily myelinated, large-diameter fibers

    • B. 

      Myelinated, small-diameter fibers

    • C. 

      Unmyelinated, small-diameter fibers

    • D. 

      Unmyelinated, large-diameter fibers

  • 10. 
    Chemical synapses are characterized by all of the following except
    • A. 

      The release of neurotransmitter by the presynaptic membranes

    • B. 

      Postsynaptic membranes bearing receptors that bind neurotransmitter

    • C. 

      Ions flowing through protein channels from the presynaptic to the postsynaptic neuron

    • D. 

      A fluid-filled gap seperating the nuerons

  • 11. 
    Biogenic amine neurotransmitters include all but
    • A. 

      Norepinephrine

    • B. 

      Acetylcholine

    • C. 

      Dopamine

    • D. 

      Serotonin

  • 12. 
    The neuropeptides that act as natural opiates are:
    • A. 

      Substance P

    • B. 

      Somatostatin

    • C. 

      Cholecystokinin

    • D. 

      Enkephalins

  • 13. 
    Inhibition of acetylcholinesterase by poisoning blocks neurotransmission at the neuromuscular junction because
    • A. 

      ACh is no longer released by the presynaptic terminal

    • B. 

      ACh synthesis in the presynaptic terminal is blocked

    • C. 

      ACh is not degraded, hence prolonged depolarization is enforced on the posysynaptic cell

    • D. 

      ACh is blocked from attaching to the postsynaptic ACh receptors

  • 14. 
    The anatomical region of a multipolart neuron that has the lowest threshold for generating an AP is the
    • A. 

      Soma

    • B. 

      Dendrites

    • C. 

      Axon hillock

    • D. 

      Distal axon

  • 15. 
    An IPSP is inhibitory because
    • A. 

      It hyperpolarizes the posysynaptic membrane

    • B. 

      It reduces the amount of neurotransmitter released by the presynaptic terminal

    • C. 

      It prevents calcium ion entry into the presynaptic terminal

    • D. 

      It changes the threshold of the neuron

  • 16. 
    Identify the neuronal circuits described the choosing the correct response. (1) Impulses continue around and around the circuit until one neuron stops firing.
    • A. 

      Converging

    • B. 

      Diverging

    • C. 

      Parallel after-discharge

    • D. 

      Reverberating

  • 17. 
    (2) One or a few inputs ultimately influence large numbers of neurons
    • A. 

      Converging

    • B. 

      Diverging

    • C. 

      Parallel after-discharge

    • D. 

      Reverberating

  • 18. 
    (3) Many neurons influence a few neurons
    • A. 

      Converging

    • B. 

      Diverging

    • C. 

      Reverberating

    • D. 

      Parallel after-discharge

  • 19. 
    (4) may be involved in exacting types of mental activity
    • A. 

      Converging

    • B. 

      Diverging

    • C. 

      Parallel after-discharge

    • D. 

      Reverberating

  • 20. 
    A muscle that assists an agonist by causing a like movement or by stabilizing a joint over which an agonist acts is
    • A. 

      An antagnonist

    • B. 

      Prime mover

    • C. 

      Synergist

    • D. 

      Agonist

  • 21. 
    The arrangement of muscle fibers in which the fibers are arranged at an angle to a central longitudinal tendon is
    • A. 

      Circular

    • B. 

      Longitudinal

    • C. 

      Pennate

    • D. 

      Parallel

  • 22. 
    Match the facial muscle description to the appropriate name. (1) Squints the eye
    • A. 

      Corrugator supercilii

    • B. 

      Zygomaticus

    • C. 

      Obicularis oculi

  • 23. 
    (2) raises the eyebrows
    • A. 

      Frontal belly of epicranius

    • B. 

      Occipital belly of epicranius

    • C. 

      Depressor anguli oris

  • 24. 
    (3) Smiling muscle
    • A. 

      Obicularis oris

    • B. 

      Zygomaticus

    • C. 

      Corrugator supercilii

  • 25. 
    (4) Puckers the lips
    • A. 

      Depressor anguli oris

    • B. 

      Orbicularis oculi

    • C. 

      Orbicularis oris

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