Brain physiology.txt

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Brain physiology.txt
2011-10-06 02:29:19
brain physiology

Chem dependency test 2 SG
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  1. How is the nervous system divided?
    • 1. Central Nervous System (CNS)
    • 2. Peripheral (PNS)
  2. the CNS consists of: +notes
    • - brain
    • - spinal chord
    • "CNS is where the action occurs"
    • Plasticity
    • Can undergo changes without our awareness of them
  3. the PNS consists of:
    • somatic
    • autonomic
  4. Autonomic, sympathetic, and parasympathetic nervous systems do what?
    • Autonomic: Involuntary
    • Sympatheic: Arousing
    • Parasympathetic: Calming
  5. Synapses
  6. The 3 main functions that the CNS are:
    • 1. Circulatory system
    • 2. Respiratory system
    • 3. Reflex system
  7. What 3 ways do drugs affect learning?
    • 1. impair the ability of the brain to store information (amnesia)--most common effect
    • 2. Distort reality
    • 3. (in rare cases) increase learning
  8. 3 affects of drgus on the brain:
    • 1. increased inhibition (limiting neuroplasticity)
    • 2. reduced excitation
    • 3. changes in biochemistry so that learning is impaired
  9. nuerotransmitter parts
  10. Agonist definition:
    A drug that binds to a receptor of a cell and triggers a response by the cell. An agonist often mimics the action of a naturally occurring substance.

    An agonist produces an action. It is the opposite of an antagonist which acts against and blocks an action.

    Ex. Morphine mimics the actions of endorphins.
  11. Antagonist definition:
    • acts against and blocks an action.
    • For example, insulin lowers the level of glucose (sugar) in the blood, whereas another hormone called glucagon raises it; therefore, insulin and glucagon are antagonists.
    • Ex. Alcohol blocks serotonin activity.
  12. the parts of the brain and their functions
  13. Main component of nervous system is
    the neuron
  14. The neuron has four basic components:
    • dendrite
    • soma
    • axon
    • bouton.
  15. Neurons communicate with each other with:
  16. The brain is divided up into functional areas like:
    (e.g., somatosensory and motor cortex)
  17. Cortical areas governed by:
    regular organization and cortical amplification.