Module 5 - The Nervous System and the Endocrine System

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Across
  1. 4. _____ nervous system; The division of the peripheral nervous system that controls the glands and muscles of the internal organs.
  2. 10. ________ nerves; Nerves that carry information from the sense receptors to the spinal cord and brain.
  3. 11. A nerve cell; the basic building block of the nervous system.
  4. 12. A drug that blocks the effect of a neurotransmitter.
  5. 15. A drug that boosts the effect of a neurotransmitter.
  6. 16. _____ cells; 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.
  7. 17. axon ____; The end point of a neuron, where neurotransmitters are stored.
  8. 20. _____ division; The part of the autonomic nervous system that arouses the body to deal with perceived threats.
  9. 21. _____ nervous system; The sensory and motor nerves that connect the brain and the spinal cord to the rest of the body.
  10. 23. The branching extensions of a neuron that receive information and conduct impulses toward the cell body (soma).
Down
  1. 1. A chemical messenger that travels across the synapse from one neuron to the next
  2. 2. The extension of a neuron through which neural impulses are sent.
  3. 3. _________ effect; A neurotransmitter effect that makes it more likely that the receiving neuron will generate an action potential, or fire.
  4. 5. _______ system; One of the body’s two communication systems. A set of glands that produce hormones, chemical messengers that circulate in the blood.
  5. 6. _____ gland; The endocrine system’s master gland. In conjunction with an adjacent brain area, controls the other endocrine glands.
  6. 7. The tiny, fluid-filled gap between the axon terminal of one neuron and the dendrite of another.
  7. 8. ______ nervous system; The brain and the spinal cord.
  8. 9. ________ principle; The principle stating that if a neuron fires, then it always fires at the same intensity.
  9. 10. _____ nervous system; The division of the peripheral nervous system that controls the body’s skeletal muscles.
  10. 13. _____ potential; A neural impulse; a brief electrical charge that travels down the axon of a neuron.
  11. 14. _____ division; The part of the autonomic nervous system that calms the body.
  12. 16. ____ potential; The state of a neuron when it is at rest and capable of generating an action potential.
  13. 18. _____; Nerve cells in the brain and spinal cord responsible for processing information.
  14. 19. A chemical messenger produced by the endocrine glands and circulated in the blood.
  15. 22. ______ effect; A neurotransmitter effect that makes it less likely that a receiving neuron will generate an action potential, or fire.