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

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lonelygirl
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Chapter 13 The Peripheral Nervous System and Reflex Activity (TB)
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2013-05-19 16:41:22
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Biology Anatomy Physiology
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Biology 103A
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  1. The "knee jerk" reflex is an example of a(n) ________.

    A) extensor thrust reflex
    B) cross extensor reflex
    C) stretch reflex
    D) stress reflex
    C) stretch reflex
    (this multiple choice question has been scrambled)
  2. The ________ nerve is not a branch of the trigeminal nerve.

    A) ophthalmic
    B) maxillary
    C) cervical
    D) mandibular
    C) cervical
    (this multiple choice question has been scrambled)
  3. Which of the following nerves does not arise from the brachial plexus?

    A) ulnar
    B) radial
    C) median
    D) phrenic
    D) phrenic
    (this multiple choice question has been scrambled)
  4. Which of the following is at the lowest level of the CNS?

    A) direct system
    B) indirect system
    C) projection level
    D) CPG
    D) CPG
    (this multiple choice question has been scrambled)
  5. The three primary levels of neural integration in a sensory system include all of the following except the ________.

    A) perceptual level
    B) receptor level
    C) circuit level
    D) effector level
    D) effector level
    (this multiple choice question has been scrambled)
  6. The posterior side of the thigh, leg, and foot is served by the ________ nerve.

    A) common fibular
    B) femoral
    C) obturator
    D) tibial
    D) tibial
    (this multiple choice question has been scrambled)
  7. Starting at the spinal cord, the subdivisions of the brachial plexus are, in order ________.

    A) divisions, rami, trunks, and cords
    B) rami, trunks, divisions, and cords
    C) rami, divisions, cords, and trunks
    D) trunks, divisions, cords, and rami
    B) rami, trunks, divisions, and cords
    (this multiple choice question has been scrambled)
  8. The cranial nerve with a dual origin (brain and spinal cord) is the ________.

    A) glossopharyngeal
    B) vagus
    C) hypoglossal
    D) accessory
    D) accessory
    (this multiple choice question has been scrambled)
  9. Which of the following is not a nerve plexus?

    A) cervical
    B) brachial
    C) thoracic
    D) lumbar
    C) thoracic
    (this multiple choice question has been scrambled)
  10. A major nerve of the lumbar plexus is the ________.

    A) femoral
    B) sciatic
    C) iliohypogastric
    D) ilioinguinal
    A) femoral
    (this multiple choice question has been scrambled)
  11. Spinal nerves exiting the cord from the level of L4 to S4 form the ________.

    A) thoracic plexus
    B) femoral plexus
    C) lumbar plexus
    D) sacral plexus
    D) sacral plexus
    (this multiple choice question has been scrambled)
  12. The abducens nerve ________.

    A) relays sensory information from taste buds on the tongue
    B) supplies innervation to the lateral rectus muscle of the eye
    C) exits from the medulla
    D) if paralyzed, exhibits Bellʹs palsy
    B) supplies innervation to the lateral rectus muscle of the eye
    (this multiple choice question has been scrambled)
  13. Basic reflexes ________.

    A) are rapid, predictable, learned responses
    B) are autonomic only
    C) may be modified by learned behavior
    D) are always mediated by the brain
    C) may be modified by learned behavior
    (this multiple choice question has been scrambled)
  14. Which of the following is not true about the integration center of a reflex arc?

    A) The center is a simple reflex arc.
    B) It is always located in the CNS.
    C) The center may be a single synapse between a motor and a sensory neuron.
    D) There are always multiple synapses with chains of interneurons.
    D) There are always multiple synapses with chains of interneurons.
    (this multiple choice question has been scrambled)
  15. Striking the ʺfunny boneʺ is actually stimulation of the ________.

    A) median nerve
    B) sciatic nerve
    C) ulnar nerve
    D) radial nerve
    C) ulnar nerve
    (this multiple choice question has been scrambled)
  16. Which of the following numbers of pairs of spinal nerves is correct?

    A) eight sacral
    B) twelve thoracic
    C) six lumbar
    D) six cervical
    B) twelve thoracic
    (this multiple choice question has been scrambled)
  17. Select the statement about plexuses that is most correct ________.

    A) Each branch of the plexus contains fibers from a single spinal nerve
    B) The ventral rami of thoracic spinal nerves unite to form the thoracic plexus
    C) The dorsal rami of all spinal nerves unite to form complex networks
    D) Only ventral rami form plexuses
    D) Only ventral rami form plexuses
    (this multiple choice question has been scrambled)
  18. A reflex that causes muscle relaxation and lengthening in response to muscle contraction is called a ________.

    A) crossed extensor reflex
    B) plantar reflex
    C) flexor reflex
    D) Golgi tendon reflex
    D) Golgi tendon reflex
    (this multiple choice question has been scrambled)
  19. Pressure, pain, and temperature receptors are ________.

    A) exteroceptors
    B) chemoreceptors
    C) interoceptors
    D) proprioceptors
    A) exteroceptors
    (this multiple choice question has been scrambled)
  20. Potentially damaging stimuli that result in pain are selectively detected by ________.

    A) nociceptors
    B) interoceptors
    C) proprioceptors
    D) photoreceptors
    A) nociceptors
    (this multiple choice question has been scrambled)
  21. Meissnerʹs corpuscles ________.

    A) are interoceptors
    B) are anatomically unencapsulated
    C) are mechanoreceptors
    D) are found primarily in connective tissue
    C) are mechanoreceptors
    (this multiple choice question has been scrambled)
  22. Which receptors adapt most slowly?

    A) smell receptors
    B) touch receptors
    C) nociceptors
    D) pressure receptors
    C) nociceptors
    (this multiple choice question has been scrambled)
  23. The abducens nerve conveys proprioceptor impulses from the ________ to the brain.

    A) inferior rectus muscle
    B) superior rectus muscle
    C) medial rectus muscle
    D) lateral rectus muscle
    D) lateral rectus muscle
    (this multiple choice question has been scrambled)
  24. Nerves that carry impulses toward the CNS only are ________.

    A) motor nerves
    B) efferent nerves
    C) afferent nerves
    D) mixed nerves
    C) afferent nerves
    (this multiple choice question has been scrambled)
  25. After axonal injury, regeneration in peripheral nerves is guided by ________.

    A) Schwann cells
    B) Golgi organs
    C) Wallerian cells
    D) dendrites
    A) Schwann cells
    (this multiple choice question has been scrambled)
  26. Regeneration within the CNS ________.

    A) is promoted by growth inhibitors and glial scars
    B) typically allows axonal sprouting of 20 mm
    C) is complicated by secondary demyelination
    D) is more successful than with the PNS
    C) is complicated by secondary demyelination
    (this multiple choice question has been scrambled)
  27. In a crossed extensor reflex, if the right arm were grabbed it would flex and the left arm would ________.

    A) also flex
    B) extend
    C) abduct
    D) adduct
    B) extend
    (this multiple choice question has been scrambled)
  28. Select the correct definition.

    A) Perceptual detection is the ability to detect how much stimulus is applied to the body.
    B) Spatial discrimination allows us to recognize textures.
    C) Magnitude estimation is the simplest level of sensation.
    D) Pattern recognition allows us to see a familiar face.
    D) Pattern recognition allows us to see a familiar face.
    (this multiple choice question has been scrambled)
  29. All processing at the circuit level going up to the perceptual level must synapse in the ________.

    A) thalamus
    B) reticular formation
    C) pons
    D) medulla
    A) thalamus
    (this multiple choice question has been scrambled)
  30. The sciatic nerve is a combination of which two nerves?

    A) pudendal and posterior femoral cutaneous
    B) posterior femoral cutaneous and tibial
    C) pudendal and common fibular
    D) common fibular and tibial
    D) common fibular and tibial
    (this multiple choice question has been scrambled)
  31. The largest and longest nerve of the body is found in the ________.

    A) brachial plexus
    B) lumbar plexus
    C) sacral plexus
    D) cervical plexus
    C) sacral plexus
    (this multiple choice question has been scrambled)
  32. Irritation of a major nerve of this plexus may cause hiccups.

    A) sacral plexus
    B) thoracic plexus
    C) lumbar plexus
    D) cervical plexus
    D) cervical plexus
    (this multiple choice question has been scrambled)
  33. Bellʹs palsy ________.

    A) is characterized by loss of vision
    B) is characterized by paralysis of facial muscles
    C) is characterized by partial paralysis of diaphragm muscles
    D) is often caused by inflammation of the trigeminal nerve
    B) is characterized by paralysis of facial muscles
    (this multiple choice question has been scrambled)
  34. Babinskiʹs sign is ________.

    A) caused by incomplete development of the thalamus in the infant
    B) a reflex whose physiological mechanism is well understood
    C) normal in an infant less than 4 years old
    D) when the great toe dorsiflexes and the other toes fan laterally
    D) when the great toe dorsiflexes and the other toes fan laterally
    (this multiple choice question has been scrambled)
  35. A simple spinal reflex goes along which of the following reflex arcs?

    A) effector, efferent neuron, integration center, afferent neuron, receptor
    B) effector, afferent neuron, integration center, efferent neuron, receptor
    C) receptor, afferent neuron, integration center, efferent neuron, effector
    D) receptor, efferent neuron, integration center, afferent neuron, effector
    C) receptor, afferent neuron, integration center, efferent neuron, effector
    (this multiple choice question has been scrambled)
  36. Mixed cranial nerves containing both motor and sensory fibers include all except which of the following?

    A) oculomotor
    B) vestibulocochlear
    C) facial
    D) trigeminal
    B) vestibulocochlear
    (this multiple choice question has been scrambled)
  37. Transduction refers to conversion of ________.

    A) receptor energy to stimulus energy
    B) stimulus information to nerve impulses
    C) afferent impulses to efferent impulses
    D) presynaptic nerve impulses to postsynaptic nerve impulses
    B) stimulus information to nerve impulses
    (this multiple choice question has been scrambled)
  38. ________ always takes a nonspecific ascending pathway.

    A) Temperature
    B) Arousal
    C) Pain
    D) Touch
    D) Touch
    (this multiple choice question has been scrambled)
  39. The flexor muscles in the anterior arm (biceps brachii and brachialis) are innervated by what nerve?

    A) ulnar
    B) radial
    C) musculocutaneous
    D) median
    C) musculocutaneous
    (this multiple choice question has been scrambled)
  40. The cranial nerves that have neural connections with the tongue include all except the ________.

    A) trigeminal
    B) glossopharyngeal
    C) facial
    D) trochlear
    D) trochlear
    (this multiple choice question has been scrambled)
  41. Problems in balance may follow trauma to which nerve?

    A) vestibulocochlear
    B) trigeminal
    C) abducens
    D) accessory
    A) vestibulocochlear
    (this multiple choice question has been scrambled)
  42. A fracture of the ethmoid bone would result in damage to which cranial nerve?

    A) olfactory
    B) vagus
    C) glossopharyngeal
    D) accessory
    A) olfactory
    (this multiple choice question has been scrambled)
  43. Select the statement that is most correct.

    A) Ganglia are collections of neuron cell bodies in the CNS that are associated with efferent fibers.
    B) The cell bodies of afferent ganglia are located in the spinal cord.
    C) The dorsal root ganglion is a motor-only structure.
    D) Afferent nerve fibers contain cell bodies of sensory neurons.
    D) Afferent nerve fibers contain cell bodies of sensory neurons.
    (this multiple choice question has been scrambled)
  44. An improperly delivered gluteal injection could result in ________.

    A) paresthesia
    B) postpoliomyelitis muscular atrophy
    C) sciatica
    D) neurofibromatosis
    C) sciatica
    (this multiple choice question has been scrambled)
  45. Which nerve does not use the jugular foramen as a route of exit from the skull?

    A) glossopharyngeal
    B) accessory
    C) trigeminal
    D) vagus
    C) trigeminal
    (this multiple choice question has been scrambled)
  46. The peripheral nervous system includes ________.

    A) sensory receptors
    B) the spinal cord
    C) basal nuclei
    D) the corpus callosum
    A) sensory receptors
    (this multiple choice question has been scrambled)
  47. Feeling a gentle caress on your arm would likely involve all of the following except ________.

    A) root hair plexuses
    B) Merkel discs
    C) Pacinian corpuscles
    D) Meissnerʹs corpuscles
    C) Pacinian corpuscles
    (this multiple choice question has been scrambled)
  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?

    A) facial
    B) accessory
    C) hypoglossal
    D) glossopharyngeal
    A) facial
    (this multiple choice question has been scrambled)
  49. The circuit level of the somatosensory system involves CNS centers in all of the following except the ________.

    A) spinal cord
    B) thalamus
    C) cerebral cortex
    D) brain stem
    C) cerebral cortex
    (this multiple choice question has been scrambled)
  50. The projection level of the brain does not include the ________.

    A) reticular formation
    B) basal nuclei
    C) brain stem nuclei
    D) cerebellum
    B) basal nuclei
    (this multiple choice question has been scrambled)
  51. If the ventral root of a spinal nerve were cut, what would be the result in the tissue or region that nerve supplies?

    A) a complete loss of voluntary movement
    B) loss of neither sensation nor movement but only of autonomic control
    C) a complete loss of sensation and movement
    D) complete loss of sensation
    A) a complete loss of voluntary movement
    (this multiple choice question has been scrambled)
  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.
    Hiltonʹs
  53. ________ are modified free-nerve endings found in the stratum germinativum.
    Merkel discs
  54. The perineurium defines the boundary of a ________.
    fascicle
  55. The ________ nerve is the largest of the cranial nerves.
    trigeminal
  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 ________.
    VII
  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
    Ischemia
  60. Pain perception is involved in the ________ ascending pathways of the somatosensory system.
    nonspecific
  61. Complex motor behavior such as walking depends on ________ patterns.
    fixed-action
  62. The meningeal branch of a spinal nerve actually reenters the vertebral canal to innervate the meninges and blood vessels. True or False
    True
  63. In the somatosensory system there are no third-order neurons in the cerebellum. True or False
    True
  64. There are 41 pairs of spinal nerves. True or False
    False
  65. The glossopharyngeal nerve is the only cranial nerve that contains sensory fibers. True or False
    False
  66. The musculocutaneous nerve is a major nerve of the brachial plexus. True or False
    True
  67. The second cranial nerve forms a chiasma at the base of the brain for partial crossover of neural fibers. True or False
    True
  68. The only cranial nerves to extend beyond the head and neck region are the vagus nerves. True or False
    True
  69. The dorsal ramus consists only of motor fibers bringing information to the spinal cord. True or False
    False
  70. Dermatomes are skin segments that relate to sensory innervation regions of the spinal nerves. True or False
    True
  71. Spinal roots and rami are similar in that they both contain sensory and motor fibers. True or False
    True
  72. Irritation of the phrenic nerve may cause diaphragm spasms called hiccups. True or False
    True
  73. The obturator nerve branches from the sacral plexus. True or False
    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
    False
  75. External strabismus and ptosis could be caused by damage to the oculomotor nerve. True or False
    True
  76. External strabismus and ptosis could be caused by damage to the oculomotor nerve. True or False
    True

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