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5 Written questions

5 Matching questions

  1. three classes of gated channels
  2. synaptic delay
  3. Peripheral Nervous System (PNS)
  4. organs of nervous system
  5. depolorization, repolarization, and hyperpolarization
  1. a chemically gated channels -
    -open in presence of specific chemicals (hormone or neurotransmitters)
    -found on neuron cell body and dendrites

    voltage-gated channels -
    -respond to changes in transmembrane potential
    -found in neural axons, skeletal muscle sarcolemma, cardiac muscle

    mechanically gated channels -
    -respond to membrane distortion
    -found in sensory receptors (touch, pressure, vibration)
  2. b
  3. c -brain
    -spinal cord
    -sensory receptors of sense organs
    -nerves connect nervous system with other systems
  4. d -all tissue outside the CNS
    -deliver sensory info to the CNS
    -carry motor commands to peripheral tissues and systems
  5. e -fewer synapses mean faster response
    -reflexes may involve only one synapse

5 Multiple choice questions

  1. somatic nervous system (SNS) -
    autonomic (visceral) nervous system (ANS) -
  2. chemically regulated channels -

    mechanically regulated channels -
    -pressure (membrane distortion)
  3. -chemical gradients -
    -electrical gradients - potassium ions leave cytosol (ICF) more rapidly than sodium enters; makes interior more negative
    -electrochemical gradients - sum of chemical and electrical forces acting across the membrane
  4. functions are to process and coordinate:
    -sensory data: from inside and outside body
    -motor commands: control activities of peripheral organs (e.g. skeletal muscles)
    -higher functions of brain: intelligence, memory, learning, emotion
  5. wallerian degeneration - axon distal to injury degenerates
    schwann cells - form path for new growth; wrap new axon in myelin

5 True/False questions

  1. afferent division-carries motor commands
    -from CNS to PNS muscles and glands


  2. structure of a synapse


  3. inhibitioncells that send and receive signals


  4. perikaryoncells that send and receive signals


  5. active forcessodium potassium exchange pump


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