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5 Written Questions

5 Matching Questions

  1. What parts of neurons are found in gray matter? White matter? Why is it white?
  2. If a neuron synapses on a second neuron and drives the resting membrane potential further from threshold, what is this called? Where does it occur?
  3. What is a presynaptic neuron? Postsynaptic neuron? Define converge, divergence of neurons.
  4. Where are interneurons or association neurons located?
  5. Name the 3 types of neurons (based on structure).
  1. a In the spinal cord
  2. b Unipolar
    Bipolar
    Multipolar
  3. c Presynaptic - The neuron that sends the action potential to the next dendrite
    Postsynaptic - Receives the message
    Convergence of Neurons - First one neuron is influenced by many others, resulting in a convergence of input.
    Divergence of Neurons - When the neuron fires, the signal is sent to many other neurons, resulting in a divergence of output.
  4. d IPSP, Inhibitory Post Synaptic Potential.
    Sensory Neurons
  5. e Cell bodies found in gray matter
    Mylenated Axons
    Because the tissue is composed of fatty tissue.

5 Multiple Choice Questions

  1. Central Nervous System (CNS) and Peripheral Nervous System (PNS)

    Somatic (Voluntary)
    Autonomic (involuntary). Within this, there are Sympathetic (Fight or Flight) and Parasympathetic (Rest and digest).
  2. Depolarization - Potential difference becomes smaller or less polar. If extracellular concentration of K+ increases, there is less gradient between inside and outside.
    Hyperpolarization - Potential difference becomes greater or more polar. If extracellular concentration of K+ decreases, steeper gradient between inside and outside
  3. Active
  4. Axonal transport is a cellular process responsible for movement of mitochondria, lipids, synaptic vesicles, proteins, and other cell parts (i.e. organelles) to and from a neuron's cell body, through the cytoplasm of its axon
  5. Dendrites coming into cell body
    cell body contains the nucleus goes into the axon starting with the axon hillock
    the axon travels down to axon terminals

5 True/False Questions

  1. Which channels are activated for depolarization in an action potential?Voltage Gated Na+ Channels

          

  2. What is salutatory conduction of an action potential? Does it occur in all nerve fibers? How does diameter of a nerve fiber affect speed of conduction?Salutatory conduction of an action potential is when you jump from node to node.
    Yes

          

  3. What ions are pumped out the cell when the Na/K pump is activated?3 Na out, 2 K in

          

  4. How are electrical potentials of cell membranes measured?mV

          

  5. How does nerve tissue respond to injury? What cells are responsible for the repair? Where can it occur?PNS
    Everywhere except the brain

          

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