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5 Written questions

5 Matching questions

  1. sound intensity
  2. refractory period
  3. h gate sodium channel
  4. trigeminal touch pathway
  5. amino acids
  1. a - follows an ap
    - cannot be fired even if there is a transient depolarization
    - due to Na channel inactivation, h gate slow to reopen
    - membrane is negative for h gate to reopen
    - ends when the K channel closes
    - subquent ap cannot be generated until membrane is repolarized
  2. b - start with "g"
    - also aspartate
    - made in axon terminus (synaptic vesicles
  3. c - inactivation gate
    - closes slowly after membrane is depolarized
    - causes the absolute refactory period for AP generation
  4. d - encoded by rate of firing and # of active neurons
    - the greater the amplitude wave, the greater distance along basilar membrane that moves - activate more hair cells and more SGNs
  5. e - two trigeminal nerves CNS
    - eachh diveded into 3 PNs that innervate face, mouth, and anterior 2/3 tongue & dura matter
    - synapse ipsilaterally on trigeminal nucleus in pons
    - deccusate and ascend contralaterally to synapse on VP nucleus in thalamus
    - thalamic axons project to S1 cortex

5 Multiple choice questions

  1. - single polypeptide with seven membrane spanning alpha-helices
  2. - increased outward K flux through voltage gate ion channels
    - increase depolarization
  3. - nuclei surrounding thalamus with a common function
    - putamen, globus pallidus, caudate nucleus (aka striatum)
    - substantia nigra
    - subthalamic nuclei
    - a group of deep brain nuclei involved in plannng of voluntary movement including starting & stoping a movement and tone of antigravity muscle
    - lesions cause parkinson's disease
  4. - dorsal column-medial leminiscus pathway
    - spinothalamic pathway
  5. - "feel" sensation on the appropriate body part

5 True/False questions

  1. othodromic- ap travels in one direction


  2. GABA receptor subtypes- GABAa & GABAc - iontrophic (fast acting & short)
    - GABAb - metrotrophic (slow, long lasting, widespread)


  3. phosphorylation and dephosphorylation- needed to trigger the ap
    - opens K channels


  4. temporal lobe- involved in processing hearing and language


  5. sacal media- bounded by basilar & ressner's membranes
    - has endolymph fluid


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