The Nervous System and the Endocrine System

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Across
  1. 1. A neurotransmitter effect that makes it less likely that a receiving neuron will generate an action potential or fire
  2. 6. the part of the autonomic nervous system that arouses the body to deal with perceived threats
  3. 8. A nerve cell, the basic building block of the nervous system
  4. 9. (CNS)includes the brain and the spinal cord, both of which are so important that they are encased in bone for protection
  5. 10. The Building Blocks of the Nervous System,
  6. 11. Nerve cells in the brain and spinal cord responsible for processing information
  7. 12. a neural impulse, a brief electrical charge that travels down the axon of a neuron
  8. 14. The cell body that maintains the health of the neuron
  9. 16. is one of the body’s two communication systems, a set of glands that produce hormones, chemical messengers that circulate in the blood.
  10. 18. A chemical messenger that travels across the synapse from one neuron to the next and influences whether a neuron will generate an action potential
  11. 20. A neurotransmitter effect that makes it more likely that the receiving neuron will generate an action potential or fire
  12. 23. the part of the autonomic nervous system that calms the body
  13. 24. The endocrine system’s master gland, in conjunction with an adjacent brain area, controls the other endocrine glands.
  14. 25. The tiny, fluid-filled gap between the axon terminal of one neuron and the dendrites of another,
  15. 26. Specialized cells in every sensory system of the body that can turn other kinds of energy into action potentials (neural impulses) that the brain can process
Down
  1. 2. (PNS) contains all sensory nerves and motor nerves that connect the brain and the spinal cord to the rest of the body
  2. 3. The state of a neuron when it is at rest and capable of generating an action potential
  3. 4. The extension of a neuron through which neural impulses are sent
  4. 5. The branching extensions of a neuron that receive information and conduct impulses toward the cell body (soma)
  5. 7. the division of the peripheral nervous system that controls the glands and muscles in the sense that you don’t need conscious thought to activate it
  6. 13. the division of the peripheral nervous system that controls the body’s skeletal muscles
  7. 15. The principle stating that if a neuron fires, then it always fires at the same intensity; all action potentials have the same strength
  8. 17. an action potential followed by a brief phase
  9. 19. Nerves that carry information from the sense receptors to their spinal cord and brain
  10. 21. The endpoint of a neuron, where neurotransmitters are stored
  11. 22. a chemical messenger produced by the endocrine glands and circulated in the blood