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2012-10-13 16:40:35
II Exam one

Exam one
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  1. What is Anatomy?
    The study of form or structure
  2. Physiology is what?
    The study of function
  3. what are the 3 functions of the nervous system?
    • 1)sensory function
    • 2)integrative function
    • 3)motor function
  4. what do sensory functions do?
    nervous tissue senses changes in the internal and external enviornments
  5. what do integrative functions do?
    brain and or spinal cord decide if a response is necessary
  6. what do motor functions do?
    produce a response
  7. anatomically what two things make up the CNS?
    • brain
    • &
    • spinal cord
  8. anatomically, what two things make up the PNS?
    • cranial nerves
    • &
    • spinal nerves
  9. physiologically, somatic nervous system is voluntary or involuntary?
  10. physiologically, the autonomic nervous system is voluntary or involuntary?
  11. physiologically, somatic nervous system inervates what?
    skelatal muscle
  12. physiologically, autonomi nervous system inervates what?
    cardiac muscle, smooth muscle, and glands
  13. sympathetic (            or             ) nervous system
    • fight
    • flight
  14. parasympathetic (           &            ) nervous system
    • rest
    • restore
  15. What voltage is resting membrane potential?
    -70 milivolts
  16. what is the threashold voltage at wich and action potential is produced?
  17. what is the voltage during hyperpolarization
  18. when is the absolute refractory period?
  19. when is the relative refractory period?
  20. what are the sodium and potassium gate conditions at resting?
    • sodium- closed
    • potassium- closed
  21. what are the sodium and potassium gate conditions at depolarization?
    • sodium-open
    • potassium-closed
  22. what are the sodium and potassium gate conditions at repolarization?
    • sodium-closed
    • potassium-open
  23. what are the sodium and potassium gate conditions at hyperpolarization?
    • sodium- closed
    • potassium- remain open for a short period of time
  24. a synapse is...
    a junction between two neurons between a nueron and its effector
  25. how is an electrical signal converted in a synapse?
    electrical-> chemical-> electrical
  26. excitatory neurotransmitters-drive the membrane potential             the threshold.
  27. inhibitory neurotransmitters drive the membrane potential                 the threshold
    away from
  28. what are the three possible fates of neurotransmitters?
    • 1)may be broken down by an enzyme
    • 2)may be taken back up by the synaptic end bulb and be reused
    • 3)may defuse out of synaptic cleft and be lost