The Nervous System

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Across
  1. 3. Carries messages to and from the brain to the rest of the body; also mediates reflexes.
  2. 8. Carry impulses from sensory neurons to motor neurons.
  3. 10. _______________ neurons carry impulses to the spinal cord and brain from all parts of the body.
  4. 13. _______________ nervous system is the part of the ANS that dominates control of many visceral effectors under normal, everyday conditions, counterbalance’s sympathetic function.
  5. 14. ______________nervous system is the part of the autonomic nervous system that regulates the "fight or flight" response.
  6. 15. Neuron structure consists of three main parts-_________________, cell body of neuron and axon.
  7. 19. The second largest part of the human brain.
  8. 20. The space between a synaptic knob and the plasma membrane of a postsynaptic neuron.
  9. 21. The beginnings of dendrites of sensory neurons.
  10. 22. The largest and uppermost part of the brain
  11. 24. Autonomic nervous system conduct impulses from the spinal cord or brainstem to the ___________, smooth muscle tissues and glandular epithelial tissues.
  12. 25. A single projection that carries nerve impulses away from the cell body.
  13. 27. Tough outer membrane of the meninges
  14. 29. White, fatty substance formed by glia that surround some axons as a sheath.
  15. 30. Gaps between Schwann cells.
  16. 31. The name of the nervous system division that includes the nerves that extend to the outlying parts of the body.
  17. 32. The name of the nervous system division that includes the brain and spinal cord.
Down
  1. 1. Part of the brainstem that is a conduction pathway between areas of the brain and body; influences respiration
  2. 2. Support cells that hold the nervous system together structurally and functionally
  3. 4. Chemicals by which neurons communicate.
  4. 5. Self propelling wave of electrical disturbance that travels along the surface of a neuron membrane
  5. 6. Nerve cells are called _____________.
  6. 7. Glia cells that help form the blood-brain barrier
  7. 9. Which part of the nervous systems function is to maintain or quickly restore the body to a homeostatic state.
  8. 11. The function of the _______________ helps control muscle contractions to produce coordinated movements so that we can maintain balance, move smoothly and sustain normal posture.
  9. 12. An involuntary response to impulse conduction over a reflex arc
  10. 16. An organ that puts nerve signals "into effect".
  11. 17. A group of peripheral axons bundled together in an epineurium is called a __________________.
  12. 18. ______________neurons carry impulses away form the brain and spinal cord.
  13. 23. Consists of the medulla oblongata, pons and midbrain.
  14. 26. ______________ nervous system which contains sympathetic and parasympathetic systems.
  15. 28. Cells that act as microbe-eating scavengers