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5 Written questions

5 Matching questions

  1. efferent division
  2. schwann cells and peripheral axons
  3. repolarization
  4. satellite cells
  5. events at a cholinergic synapse
  1. a -surrounds ganglia
    -regulate environment around neuron
  2. b
  3. c -action potential arrives, depolarizes synaptic knob
    -calcium ions enter synaptic knob, trigger exocytosis of ACh
    -ACh binds to receptors, depolarizes postsynaptic membrane
    -AChE breaks ACh into acetate and choline
  4. d -carries motor commands
    -from CNS to PNS muscles and glands
  5. e -when the stimulus is removed, transmembrane potential returns to normal

5 Multiple choice questions

  1. resting potential - transmembrane portential of resting cell
    graded potential - temporary, localized change in resting potential
    action potential - electrical impulse; produces by graded potential; propagates along surface of axon to synapse
    synaptic activity - releases neurotransmitters at presynaptic membrane; produces graded potentials in postsynaptic membrane
    information processing - response (integration of stimuli) of postsynaptic cell
  2. on a postsynaptic membrane -
    -depends on the receptor
    -not on the neurotransmitter

    E.G. acetylcholine (ACh) -
    -usually promotes action potentials
    -but inhibits cardiac neuromuscular junctions
  3. excitatory postsynaptic potential (EPSP)
    -graded depolarization of postsynaptic membrane

    inhibitory postsynaptic potential (IPSP)
    -graded hyperpolarization of postsynaptic membrane
  4. other than acetylcholine

    norepinephrine (NE) - released by adrenergic synapses; excitatory and depolarizing effect; widely distributed in brain and portions of ANS

    dopamine - a CNS neurotransmitter; may be excitatory or inhibitory

    serotonin - a CNS neurotransmitter; affects attention and emotional states

    gamma aminobutyric acid - GABA; inhibitory effect; functions in the CNS
  5. cell body

5 True/False questions

  1. action potential (nerve impulses)-are transmitted from presynaptic neuron
    -to postsynaptic neuron (or other postsynaptic cell)
    -across a synapse


  2. type A fibersbranched


  3. propogation of action potentialsalso, 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


  4. nodes and internodes-undisturbed cell
    -high permeability of potassium
    -low permeability of sodium
    -sodium-potassium pump stabilization
    -balanced at -70 mV


  5. structure of a synapse-the effect of a neurotransmitter on the postsynaptic membrane depends on the properties of the receptor, not on the nature of the neurotransmitter


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