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  1. Ch 34
  2. Taxa with with elongate, bilaterally symmetrical bodies are more
  3. Sensory towards front
  4. Vertebrates have a _____ and ______ nervous systems.
    Central and peripheral
  5. Brain and spinal cord
  6. Nerves and ganglia
  7. Nervous system has two kinds of systems
    Neurons and neuroglia
  8. Nervous system is shaped by
    Competition of neurons for survival; synapse elimination (neurons establish more synapses during development than will be maintained.)
  9. What supports and protects neurons
  10. 4 types of neuroglia
    Ependymal cells, microglia, oligodendrocytes, astrocytes
  11. Largest and most numerous of the neuroglia
  12. Structural support for neurons, establish BBB, line cpillaries to protect from toxins
  13. Ciliated cells that line the central canal and ventricles of the brain/spinal cord. Help in secretion and circulation of CSF
  14. Smallest and least numerous of neuroglia. Act as wandering police force. Engulf cellular debiris, waste and pathogens.
  15. Mediate inflamatory responses
  16. Myelinate axons in the brain and spinal cord; do same thing out side cns
  17. Myelinated axons. Link CNS to sensory/motor of PNS.
    White matter
  18. Unmyelinated; includes neuron cell bodies, dendrite
    Gray matter
  19. Grey matter surrounds white matter in the _______
  20. White matter surrounds grey matter in the _____
    Spinal cord
  21. 3 stages of info processing
  22. Information is received from sensory cells
    Afferent (sensory)
  23. Info is received at brain or ganglia, integrated, stored, and transmitted.
  24. Send commands to effectors such as muscle and glands
    Efferent (motor)
  25. Difference in electrical charge
    Membrane potential
  26. All cells have ____ across the membrane
    Membrane potential
  27. When a neuron is NOT signaling, resting potential is
    -60 mv
  28. The difference in _____ between insides and outside of cell establishes voltage differences and membrane potential
    Ionic charge
  29. Sodium/potassium pump uses ____ to move NA out and bring K in
  30. This establishes a concentration gradient and creates a neg charge inside cell. (membrane potential)
    Sodium/potassium pump
  31. Channels that are always open
    Leak channels
  32. These channels open/close due to force applied to cell membrane
    Chemically gated
  33. When the resisting potential DECREASES, this is known as
    Depolarization (towards 0mV)
  34. When the resting potention increases
  35. A small localized change in membrane potential
    Graden membrane potential
  36. Steps to action potential
    Depolarization to threshold, activation of Na channels and rapid depolarization, inactivation of Na channels and ACTIVATION of K channels, return to normal permeability
  37. During this phase, depolarization occurs, na channels are open
    Rising phase
  38. During this phase, it becomes impermeable to sodium and potassium channels open
  39. Na is still activated
  40. Falling phase plus undershooot
    Refractory period
  41. One direction of the refractory period; prevents reversals
  42. Myelin increases propagation speed by allowing a signal to jump
  43. Conduction speed is affected by
    Axon diameter and degree of myelination
  44. Neurotransmitter used in neuromuscular synapses is
    Acetylcholine (Ach)
  45. Post-synaptic membrane for a muscle cell is the
    Motor end plate
  46. If enough Ach is released, the muscle cell will
    Depolarize and generate action potential
  47. 5 main categories of neurotransmitters
    Acetylcholine, biogenic amines, amino acids, neuropeptides, dissolved gasses

    • Neuro muscular junctions use
    • Acetylcholine
  48. _____ breaks down acetylcholine
  49. Toxins inhibit release of acetylcholine (cant breathe)
  50. Has an excitatory effect
  51. May be inhibitory or excitatory. Cocain inhibits removal of this. Parkinson's disease is result of damage to neurons that produce this
  52. Inadequate production of this can have significant and widespread effects on a attention and emotional states. May be responsible for sever depression
  53. Provides automatic regulation of internal envmnt
    Autonomic nerv syst
  54. Controls skeletal muscle contractions. Voluntary, responds to external stimuli
  55. 2 parts of autonomic nervous system
    Sympathetic and parasympathetic.
  56. Post-ganglionic neurons of sympathetic are
    Noradrenergic (release norepinephrine)
  57. Post ganglionic neurons of parasmpathetic are
    Cholinergic. Release acetylcholine
  58. Ventral root controls
  59. Dorsal root controls
  60. Myelinated axons
    Whte matter
  61. Natural cell bodies
    White matter
  62. Vertebrate brains have bigger/more complex
    Olfactory, gustatory, photoreceptors, neuromasts, and electroreceptors
  63. Is formed by filtration of arterial blood
    Cerebrospinal fluid
  64. Relay station for sensory info going to telecephalon. Receives input from brain regions that regulate emotion/arousal.
  65. Includes pineal gland, participates in production of CSF
  66. Regulates endocrine glands. Body therm. And role in sex/mating behaviors, fight or flight, pleasure
  67. This is derived from telencephalon
  68. These are the centers from planning/learning sequences of movement
    Basal nuclei
  69. In mammals, the cerebrum does 3 things
    Perception, learning, memory and conscious behavior
  70. Layers of neurons on outermost part
    Neocortex, more developed in primates
  71. Top of brain in birds that has neurons clustered into nuclei, may be primitive
    Avian pallium
  72. 4 lobes of brain
    Temporal, parietal, occipital, frontal
  73. Part of the brain that receives and processes auditory info.
  74. Visual processing part of the brain
    Lower temporal
  75. Identifying and naming objects
    Lower temporal
  76. Largest part of the brain lobes. Feeling and personality
    Frontal lobe
  77. This controls muscles in specific parts of the body (fine motor control)
    Primary cortex
  78. Important in temperament, decision making, as well as emotional experience.
    Prefrontal cortex
  79. Association of complex stimuli
    Parietal lobe
  80. Responsible for somatosensory cortex, receives touch and pressure info. Translates visual info to 3d space
  81. Receives and processes visual info.
    Occipital lobe
  82. Association areas necessary to make sense of visual world and translate visual experience into language
    Occipital lobe
  83. Damage to _____ removes ability to understand speech but not to speak.
    Left temporal lobe (wernike)
  84. Limbic system is part of
  85. Limbic system includes:
    Amygdala, hippocampus, thalamus
  86. Involved in transfer of short term to long term memory
  87. Involved in processing visual and auditory info
  88. Crebelellum, pons, and medula oblongata
    Hind brain
  89. These function in breathing and circulation
    Medulla and pons
  90. This is important in coordinating muscle activity and maintaining balance
  91. Pons medulla and midbrain
  92. All axons passing in & out of higher brain regions pass through
  93. Center for heart/blood vessel activity, swallowing, vomiting, digestion, breathing; contains centers that cause sleep when activated
  94. Determines what info reaches cerebral cortex.
    Reticular formation
  95. Has arousal (wakefulness) center
    Reticular formation
  96. Integrates coordinates motor commands from cerebrum
  97. Scn stands for
    Suprachiasmatic nucleus
  98. Controls circadian rhytm
  99. Enzymes produce melatonin
  100. Shrinkage in brain tissue
  101. 2 main stages of sleep
    Rem and non rem
  102. Resembles awake brain
Card Set:
2013-06-07 06:21:29
34 principles life

ch 34 principles of life
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