P124 Quiz 2

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seanna24
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233150
Filename:
P124 Quiz 2
Updated:
2013-09-05 23:33:17
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Basic Neurophysiology
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Chap 2-1
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  1. Resting Potential
    • -70 mV
    • Pressure for Na+ to come in, but can't because the gates are closed.
  2. Action potential
    • Step 1:  Na+ gates open, Na+ floods in; Depolarizes membrane  (+40 mV)
    • Step 2:  K+ gates open, let Kout.
  3. Restoration of Resting Potential
    • Pressure from negative ions (CI-), and an ionic (Na/K) pump
    • Opposites attract
    • "Refractory Period"
  4. AP Properties
    All or None    (T/F)
    True
  5. AP Properties
    Does size matter?
    No.  Each action potential is exactly the same in magnitude.
  6. AP Properties
    Does rate matter?
    Yes.  Neurons respond differently to different stimulus intensities  (the higher the intensity, the higher the rate of firing).
  7. AP Properties
    Upper and Lower limits on rate?
    • Upper:  Approx 500-800 Hz
    • Lower:  Spontaneous activity
  8. What is the gap between the end of a neuron and beginning of the next neuron called?
    • Synapse
  9. Presynaptic neuron releases ________ (chemicals designed to fit into receptor sites on postsynaptic membrane)
    Neurotransmitters
  10. Synaptic Communication
    Which gates induce an AP in postsynaptic neuron?
    Which gates prevent an AP?
    • Excitation
    • Inhibition
  11. Neurotransmitters change _______ potential on _____ synaptic neuron in _____ increments.
    • Electrical
    • Post-synaptic
    • Small
  12. What are ESPS's?
    Excitatory post-synaptic potential
  13. What are IPSP's?
    Inhibitory post-synaptic potential
  14. What is PET?
    Position Emission Topography
  15. What is EEG?
    • Electro-Encephalography
    • "evoked potentials"
  16. What is fMRI?
    Functional Magnetic Resonance Imaging
    • Frontal lobe
    • Primary motor cortex
    • Central sulcus
    • Primary somatosensory cortex
    • Parietal lobe
    • Occipital lobe
    • Cerebellum
    • Spinal cord
    • Temporal lobe
    • Olfactory bulb
    • 1.  Caudal  (posterior)
    • 2.  Superior  (dorsal)
    • 3.  Rostral  (anterior)
    • 4.  Inferior  (ventral)
    • 1.  Coronal
    • 2.  Horizontal
    • 3.  Sagittal

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