Chapter 13 The Peripheral Nervous System and Reflex Activity (TB)

  1. The "knee jerk" reflex is an example of a(n) ________.

    D) stretch reflex
  2. The ________ nerve is not a branch of the trigeminal nerve.

    B) cervical
  3. Which of the following nerves does not arise from the brachial plexus?

    A) phrenic
  4. Which of the following is at the lowest level of the CNS?

    C) CPG
  5. The three primary levels of neural integration in a sensory system include all of the following except the ________.

    A) effector level
  6. The posterior side of the thigh, leg, and foot is served by the ________ nerve.

    C) tibial
  7. Starting at the spinal cord, the subdivisions of the brachial plexus are, in order ________.

    D) rami, trunks, divisions, and cords
  8. The cranial nerve with a dual origin (brain and spinal cord) is the ________.

    C) accessory
  9. Which of the following is not a nerve plexus?

    A) thoracic
  10. A major nerve of the lumbar plexus is the ________.

    A) femoral
  11. Spinal nerves exiting the cord from the level of L4 to S4 form the ________.

    C) sacral plexus
  12. The abducens nerve ________.

    D) supplies innervation to the lateral rectus muscle of the eye
  13. Basic reflexes ________.

    B) may be modified by learned behavior
  14. Which of the following is not true about the integration center of a reflex arc?

    C) There are always multiple synapses with chains of interneurons.
  15. Striking the ʺfunny boneʺ is actually stimulation of the ________.

    D) ulnar nerve
  16. Which of the following numbers of pairs of spinal nerves is correct?

    A) twelve thoracic
  17. Select the statement about plexuses that is most correct ________.

    A) Only ventral rami form plexuses
  18. A reflex that causes muscle relaxation and lengthening in response to muscle contraction is called a ________.

    D) Golgi tendon reflex
  19. Pressure, pain, and temperature receptors are ________.

    C) exteroceptors
  20. Potentially damaging stimuli that result in pain are selectively detected by ________.

    C) nociceptors
  21. Meissnerʹs corpuscles ________.

    C) are mechanoreceptors
  22. Which receptors adapt most slowly?

    C) nociceptors
  23. The abducens nerve conveys proprioceptor impulses from the ________ to the brain.

    C) lateral rectus muscle
  24. Nerves that carry impulses toward the CNS only are ________.

    C) afferent nerves
  25. After axonal injury, regeneration in peripheral nerves is guided by ________.

    A) Schwann cells
  26. Regeneration within the CNS ________.

    C) is complicated by secondary demyelination
  27. In a crossed extensor reflex, if the right arm were grabbed it would flex and the left arm would ________.

    B) extend
  28. Select the correct definition.

    A) Pattern recognition allows us to see a familiar face.
  29. All processing at the circuit level going up to the perceptual level must synapse in the ________.

    D) thalamus
  30. The sciatic nerve is a combination of which two nerves?

    D) common fibular and tibial
  31. The largest and longest nerve of the body is found in the ________.

    B) sacral plexus
  32. Irritation of a major nerve of this plexus may cause hiccups.

    A) cervical plexus
  33. Bellʹs palsy ________.

    B) is characterized by paralysis of facial muscles
  34. Babinskiʹs sign is ________.

    D) when the great toe dorsiflexes and the other toes fan laterally
  35. A simple spinal reflex goes along which of the following reflex arcs?

    C) receptor, afferent neuron, integration center, efferent neuron, effector
  36. Mixed cranial nerves containing both motor and sensory fibers include all except which of the following?

    B) vestibulocochlear
  37. Transduction refers to conversion of ________.

    C) stimulus information to nerve impulses
  38. ________ always takes a nonspecific ascending pathway.

    A) Touch
  39. The flexor muscles in the anterior arm (biceps brachii and brachialis) are innervated by what nerve?

    A) musculocutaneous
  40. The cranial nerves that have neural connections with the tongue include all except the ________.

    A) trochlear
  41. Problems in balance may follow trauma to which nerve?

    C) vestibulocochlear
  42. A fracture of the ethmoid bone would result in damage to which cranial nerve?

    A) olfactory
  43. Select the statement that is most correct.

    B) Afferent nerve fibers contain cell bodies of sensory neurons.
  44. An improperly delivered gluteal injection could result in ________.

    C) sciatica
  45. Which nerve does not use the jugular foramen as a route of exit from the skull?

    D) trigeminal
  46. The peripheral nervous system includes ________.

    C) sensory receptors
  47. Feeling a gentle caress on your arm would likely involve all of the following except ________.

    D) Pacinian corpuscles
  48. A patient who received a blow to the side of the skull exhibits the following signs and symptoms on that side of the face: he is unable to close his eye, and the corner of his mouth droops. Which cranial nerve has been damaged?

    D) facial
  49. The circuit level of the somatosensory system involves CNS centers in all of the following except the ________.

    A) cerebral cortex
  50. The projection level of the brain does not include the ________.

    C) basal nuclei
  51. If the ventral root of a spinal nerve were cut, what would be the result in the tissue or region that nerve supplies?

    B) a complete loss of voluntary movement
  52. ________ law states that any nerve serving a muscle that produces movement at a joint also innervates the joint itself and the skin over the joint.
  53. ________ are modified free-nerve endings found in the stratum germinativum.
    Merkel discs
  54. The perineurium defines the boundary of a ________.
  55. The ________ nerve is the largest of the cranial nerves.
  56. Ventral spinal cord roots contain ________ fibers, while the dorsal roots contain ________ fibers.
    motor (efferent); sensory (afferent)
  57. The facial nerve is cranial nerve number ________.
  58. ________ is a protective reflex that overrides the spinal pathways and prevents any other reflexes from using them at the same time.
    Flexor (polysynaptic) reflex
  59. ________ is the tingling sensation or numbness when blood has been cut off from an area, as when the foot ʺgoes to sleep.ʺ
  60. Pain perception is involved in the ________ ascending pathways of the somatosensory system.
  61. Complex motor behavior such as walking depends on ________ patterns.
  62. The meningeal branch of a spinal nerve actually reenters the vertebral canal to innervate the meninges and blood vessels. True or False
  63. In the somatosensory system there are no third-order neurons in the cerebellum. True or False
  64. There are 41 pairs of spinal nerves. True or False
  65. The glossopharyngeal nerve is the only cranial nerve that contains sensory fibers. True or False
  66. The musculocutaneous nerve is a major nerve of the brachial plexus. True or False
  67. The second cranial nerve forms a chiasma at the base of the brain for partial crossover of neural fibers. True or False
  68. The only cranial nerves to extend beyond the head and neck region are the vagus nerves. True or False
  69. The dorsal ramus consists only of motor fibers bringing information to the spinal cord. True or False
  70. Dermatomes are skin segments that relate to sensory innervation regions of the spinal nerves. True or False
  71. Spinal roots and rami are similar in that they both contain sensory and motor fibers. True or False
  72. Irritation of the phrenic nerve may cause diaphragm spasms called hiccups. True or False
  73. The obturator nerve branches from the sacral plexus. True or False
  74. Reciprocal inhibition means that while one sensory nerve is stimulated, another sensory neuron in the same area is inhibited and cannot respond. True or False
  75. External strabismus and ptosis could be caused by damage to the oculomotor nerve. True or False
  76. External strabismus and ptosis could be caused by damage to the oculomotor nerve. True or False
Card Set
Chapter 13 The Peripheral Nervous System and Reflex Activity (TB)
Biology 103A