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5 Written questions

5 Multiple choice questions

  1. are nerve cells that run through our entire bodies and communicate with each other; each of us has 100 billion of these, most of which are in the brain
  2. regulates the body's vital functions, such as heartbeat, breathing, digestion, and blood pressure; we generally do not think of these activities
  3. at the end of the axon, these small fibers branch out
  4. thin fibers branching out from the cell body; they receive info from other neurons and pass the message through the cell body; carries info to the cell body
  5. is a junction between the axon terminals of one neuron and the dendrites of another; messages only travel in one direction

4 True/False questions

  1. neurotransmittersneurons send messages across synapses through the release of this; these are the chemicals that are stored in sacs in the axon terminals


  2. spinal cordis a column of nerves about as thick as a thumb that extends from the brain down the back. It's protected by the bones of the spine and transmits messages between the brain and the muscles and glans in the body


  3. myelintransmits messages away from the cell body; a neuron usually has only one axon; they vary greatly in length.


  4. somatic nervous systemtransmits sensory messages to the central nervous system. Its function is to carry messages from voluntary muscles and sense organs