Nervous System

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Nervous System
2013-07-30 19:33:28

nervous system
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  1. Nervous System functions
    all of the above
  2. Which of the following is responsible for problem-solving skills?
    central nervous system
  3. The central nervous system includes the
    spinal cord
  4. The peripheral nervous system includes the
    cranial nerves
  5. The sensory (afferent) division of the peripheral nervous system
    conveys action potentials to the CNS
  6. The motor (efferent) division of the peripheral nervous system
    transmits impulses from the CNS to skeletal muscle
  7. The central nervous system
    is the site for processing information
  8. Which of the following is mismatched
    somatic nervous system - sensory division of PNS
  9. Dendrites
    are the input part of the neuron
  10. Synaptic vesicles contain neurotransmitter are present in the
    presynaptic terminals or terminal boutons
  11. A neuron that conducts pain sensations to the central nervous system would be classified as a(n)
    sensory or afferent neuron
  12. Neuroglia is a false statement
    neuroglia produce action potentials for skeletal muscles.
  13. The blood-brain
    protects neurons from toxic substances in the blood
  14. Multiple sclerosis is a neurological disorder in which myelin sheaths in the CNS are destroyed. Which of the following neuroglial cells is being damaged in multiple sclerosis?
  15. White matter is composed of
    bundles of myelinated axons.
  16. Which of the following events will lead to depolarization?
    an increase in K+ ions in the extracellular fluid
  17. A local potential
    • increases or decreases in direct proportion to the stimulus strength
    • Which of the following statements accurately describe events that occur as a result of a local potential reaching threshold? (B&C,E, nactivation gates of Na+ ion channels begin to open C) A positive feedback cycle develops in which depolarization causes activation gates of Na+ ion channels to open)
  18. Depolarization of the nerve cell membrane occurs when there is a rapid influx (inflow) of
    sodium ions
  19. A stimulus either causes an action potential or it doesn't. This is called
  20. positive feedback cycle
  21. If the ECF around a nerve cell is replaced with an isotonic saline solution that contains potassium ions and other solutes at concentrations very close to the ECF concentrations of a normal cell, the result is
    a resting membrane potential close to its normal value
  22. Chemical synapses are characterized by
    the release of neurotransmitter by the presynaptic terminal
  23. Neurotransmitters are released from
    cause the production of action potentials in the postsynaptic membrane
  24. Damage to a postsynaptic membrane would
    interfere with the ability to respond to neurotransmitter
  25. Neurotrasmitters
    presynaptic terminal
    • a. dendrites
    • b. neuron cell body (soma)
    • c. axon
    • d. schwann cell
    • e. node of ranvier
    • a. voltage-gated calcium channel
    • b. synaptic vesicle
    • c. presynaptic terminal
    • d. synaptic cleft
    • e. postsynaptic membrane
  26. spinal cord
  27. The spinal cord in contiguous superirly with the
    medulla oblongata
  28. Reflex arcs
  29. Which of the following statements concerning the brainstem is true
    True if you damage
  30. Medulla Oblongata (n/a)
    oval shaped mass that connects the brain to the spinal cord; functions- autonomic relay center - cardiac,respiratory, vomiting and vasomotor center
  31. Reticular Formation (n/a)
    is a network within the brainstem. a coordinating system with connections to sensory, somatic motor and visceral motor systems.
  32. Lobes of the cerebrum
  33. Corpus callosum
  34. Cerebrum
  35. Corpus Callosum (what does it consist of)
  36. The lymbic system involves various connections between
    the cerebrum and diencephalon.
    • a. brainstem
    • b. midbrain
    • c. cerebrum
    • d.  corpus callosum
    • e. cerebellum
  37. Which of the following is a somatic sense? (which one is smell, taste, touch)
  38. Vision is dependent upon
  39. Mechanoreceptors respond to
    compression of receptors
  40. Changes is the blood concentration of glucose, oxygen and hydrogen are detected by
  41. Receptors
  42. Adaptation
  43. Phantom pain
  44. If Broca's area is damaged, the result is
    hesitant and distorted speech.
  45. Rhodopsin (n/a)
    • contains protein (opsin) attached to pigment
    • (retinal)
    • light causes retinal to change shape releasing it from opsin
    • chain reaction of events results in closing
    • of Na+ channels
    • resulting hyperpolarization slows the tonic
    • firing of AP’s
    • dark adapted – all opsin and retinal is together, therefore rods are VERY sensitive, vision possible even in dark
    • light adapted – most opsin and retinal decomposes                  
    • cones take over sharp, color vision results
  46. Sclera (n/a)
    • white posterior portion, which is continuous with eyeball except where the optic
    • nerve and blood vessels pierce through it in the back of eye.
    • Functions:
    • 2.attachment (of eye muscles)
  47. Inner ear (n/a)
  48. The malleus, incus, and stapes (n/a)
    • Malleus (hammer) is connected to tympanic membrane;
    • Incus (anvil) connects malleus to stapes;
    • Stapes (stirrup) connects incus to the
  49. Semicircular canals
    • a. conjuctiva
    • b. cones
    • c. iris
    • d. pupil
    • e. lens
  50. a. mechanoreceptors
    b. thermoreceptors
    c. nociceptors
    d. chemoreceptors
    e. photoreceptors
    • a. mechanoreceptors- propripception, touch 
    • b. thermoreceptors- temperature
    • c. nociceptors- pain
    • d. chemoreceptors- smell
    • e. photoreceptors- sight
  51. which of the folowing is not an effector controlled by the autonomic nervous system
  52. efferent neurons
    ANS utilize two neurons in series to connect the CNS to the effector.
  53. In the sympathetic division of the ANS
    the preganglionic cell body is located in the lateral horn of the spinal cord
  54. Preganglionic fibers from the thoracic and lumbar segments of the spinal cord are part of the ____ division of the ANS.
  55. The two classes of adrenergic receptors are
    alpha and beta
  56. acetylcholine
    (neurotransmitter excite) both somatic and autonomic nervous systems
  57. target tissues may be stimulated or inhibited
    autonomic nervous system
  58. receptor molecules may be muscarinic or adrenergic
    autonomic nervous system