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5 Written questions

5 Matching questions

  1. events in the functioning of a cholinergic synapse
  2. electrochemical gradients for potassium and sodium ions
  3. telodendria
  4. graded potential (more info)
  5. resting potential
  1. a
  2. b -transmembrane potential is most affected at point of stimulus and then diminishes with distance
    -spreads passively
    -may involve either depolarization or hyperpolarization
    -the stronger the stimulus the greater the effect
  3. c
  4. d ...
  5. e -undisturbed cell
    -high permeability of potassium
    -low permeability of sodium
    -sodium-potassium pump stabilization
    -balanced at -70 mV

5 Multiple choice questions

  1. energy
  2. -'switch' - if info is strong enough, switch is turned on
  3. -processes contact other neuron cell bodies
    -wrap around axons to form myelin sheaths
  4. -does not happen very often
    -occurs when neurotransmitter cannot recycle fast enough to meet demands of intense stimuli
    -synapse inactive until ACh is replenished
  5. also, local potentials

    -changes in transmembrane potential that cannot spread far from site of stimulation
    -any stimulus that opens a gated channel; produces a graded potential

5 True/False questions

  1. type B fibers-myelinated
    -large diameter
    -high speed
    -carry rapid information to/from CNS
    -e.g. position, balance, touch, motor impulses


  2. transmembrane potential of an excitable membrane


  3. satellite cells-fewer synapses mean faster response
    -reflexes may involve only one synapse


  4. gangliacell body


  5. action potential (nerve impulses)-bundle of axons with connective tissues and blood vessels
    -carry sensory inf and motor commands in PNS
    -cranial nerves - connect to brain
    -spinal nerves - attach to spinal cord