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5 Written Questions

5 Matching Questions

  1. three functional classfications of neurons
  2. inhibition
  3. schwann cells
  4. type B fibers
  5. cholinergic synapses
  1. a -form myelin sheath (a layer)
    -many ~ sheath entire exon
  2. b -myelinated
    -medium diameter
    -medium speed
    -carry intermediate signals
    -e.g. sensory information, peripheral effectors
  3. c sensory neurons - afferent neurons of PNS; 10 million
    motor neurons - efferent neurons of PNS; 0.5 million
    interneuron - association neurons; CNS; 20 billion
  4. d a neuron that receives many IPSPs
    -is inhibited from producing an action potential
    -because the stimulation needed to reach threshold is increased
  5. e any synapse that releases ACh
    -all neuromuscular junctions with skeletal muscle fibers
    -many synapses in CNS
    -all neuron-to-neuron synapses in PNS
    -all neuromuscular and neuroglandular junctions of ANS parasymphathetic division

5 Multiple Choice Questions

  1. -controls skeletal muscle contractions
  2. -carries motor commands
    -from CNS to PNS muscles and glands
  3. -unmyelinated
    -small diameter
    -slow speed
    -carry slower information
    -e.g. involuntary muscle, gland controls
  4. excitatory neurotransmitters -
    -cause depolarization of postsynaptic membranes
    -promote action potentials

    inhibitory neurotransmitters -
    -cause hyperpolarization of postsynaptic membranes
    -suppres action potentials

5 True/False Questions

  1. type A fibersrefractory period -

    absolute refractory period -
    -sodium channels open or inactivated
    -no action potential possible; gates locked closed

    relative refractory period -
    -membrane potential almost normal
    -resistant to opening but w/ large stimulus can open

          

  2. effect of a neurotransmitterother 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

          

  3. neuromuscular junctionsynapse between neuron and gland

          

  4. ion movements and electrical signals

          

  5. two types of cells of nervous tissueneuron - perform all communication, information processing, control functions of nervous system
    neuroglia - momma cells, nourish, clean up others; preserve physical and biochemical structure of neural tissue and are essential to survival and function of neurons

          

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