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5 Written questions

5 Matching questions

  1. 2 ways to increas ap propagation
  2. oligodendrocytes
  3. agonists
  4. depolarization
  5. GABA
  1. a 1. increase internal diameter of axons which decreases the internal resistance to ion flow
    2. increase the resistance of the plasma membrane to charge flow by insulating it with myelin
  2. b - main IPSP in brain
    - precursor: glutmate, pryuvate, glucose
    - made by GAD (requires vitamin B6)
    - most common inhibitory NT in CNS
    - gates Cl- channels
    - barbiturates (sleeping pills): increase duration
    - benzodiazephines ( tranqualize): increase frequency
  3. c - a less negative membrane pontential triggers the firing of an ap
  4. d - in CNS
    - provide myelin sheaths around axons in the brain & spinal cord
  5. e - a drug or compund that mimics the action of the naturally occuring NT

5 Multiple choice questions

  1. - depolarization
    - threshold
    - rising phase
    - overshoot
    - falling phase
    - undershoot
    - refractory period
  2. - a calcium dependent process
    - membrane bound individual vesicles fuse with the plasma membrane
    - spill the intracellular contents of the vesicle into the extracellular space, referred to as the synaptic cleft
  3. - voltage clamp
    - identified the ion species that flowwed during ap
    - clamped Vm at 0mv to remove electric driving force that varied external ion concentration and onbserve ion efflux during a voltage step
  4. - ends when K channel closes
    - a stimulus can excite an ap, but it must be stronger than the minimum stimulus required to elict an ap at rest
  5. - precursor: acetyl CoA, chloine
    - made by cholineacetyltransferase ChAT
    - degraded by acetylchlolinsterase AChE
    - nicotinic receptor (NAChR) - muscle contraction
    - mesacrarisic receptor - slow down heart rate

5 True/False questions

  1. Broca's aphasia- inward Na current
    - m gate open

          

  2. sound intensity- innervates muscle
    - soma is in the ventral horn grey matter of the spinal cord at each level
    - efferent

          

  3. nernst- depolarization of the post-synaptic membrane caused by the neurotransmitter brings the membrane potential close to the threshold for firing an ap
    - influx of Na or Ca

          

  4. sound locallization methods- different g proteins or stimulate annd inhibit adenylyl cyclase
    - causes formation of cAMP and activation of PKA
    - PKA phosphorylates serine & threonine residues on target proteins

          

  5. overshoot- depolarization of the post-synaptic membrane caused by the neurotransmitter brings the membrane potential close to the threshold for firing an ap
    - influx of Na or Ca

          

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