Module 5 - The Nervous System and the Endocrine System

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