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5 Written questions

5 Matching questions

  1. motor neuron
  2. graded potential (more info)
  3. synaptic delay
  4. anaxonic neurons
  5. dendrite
  1. a -carry instructions from CNS to peripheral effectors
    -via efferent fibers (axons)
  2. b -fewer synapses mean faster response
    -reflexes may involve only one synapse
  3. c branched
  4. d -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
  5. e -found in brain and sense organs
    -all cell processes look alike

5 Multiple choice questions

  1. -surrounds ganglia
    -regulate environment around neuron
  2. -increases speed of action potentials
    -myelin insulates myelinated axons
    -makes nerves appear white
  3. -chemical messengers
    -affect receptors of postsynaptic membrane
  4. cells that send and receive signals
  5. -form myelin sheath (a layer)
    -many ~ sheath entire exon

5 True/False questions

  1. overview of neural activitiesother 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


  2. postsynaptic potentials-undisturbed cell
    -high permeability of potassium
    -low permeability of sodium
    -sodium-potassium pump stabilization
    -balanced at -70 mV


  3. astrocytes-migrate through neural tissue
    -clean up cellular debri, waste products, and pathogens


  4. organs of nervous system-controls contractions of smooth muscle, cardiac muscle, and glandular secretions
    -sympathetic division
    -parasympathetic division


  5. perikaryonneuroplasm