The Nervous, and Endocrine System

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Across
  1. 2. the level of stimulation required to trigger a neural impulse
  2. 7. a neurotransmitter's reabsorption of a sending neuron
  3. 12. the neuron extension that passes messages through its branches to other neurons
  4. 13. cells in the nervous system that support and protect the neurons; play a roll in thinking and memory
  5. 17. the removal of a neurotransmitter by breaking it apart by enzymes
  6. 21. a molecule that increases a neurotransmitters action
  7. 22. is located in the front part of the neck; regulates metabolism, helps with blood pressure, heart rate, digestion, muscle tone, and reproductive functions
  8. 23. the basic building block of the nervous system
  9. 24. neurons that carry outgoing information from the brain and spinal cord to the muscles and glands
  10. 25. pair of glands that sit above the kidneys; help the body in times of stress
  11. 29. the part of neuron that contains the nucleus; the cells life support
  12. 32. hormones secreted linked with pain control and pleasure
  13. 33. a neural impulse; a brief electrical charge that travels down the axon
  14. 34. neurons that carry incoming information from the body's tissues to the brain and spinal cord
  15. 36. chemical messengers that cross the synaptic gaps between neurons
  16. 37. a brief period of rest after the neuron has fired
  17. 38. the part of the peripheral nervous system that controls the body's glands and muscles for internal organs
Down
  1. 1. the division of the autonomic nervous system that conserves the body's energy; flight
  2. 3. the space between the axon tip of a sending neuron, and the dendrite or cell body of a receiving neuron
  3. 4. the sensory and motor neurons that connect the CNS to the rest of the body
  4. 5. chemical messengers of the endocrine system
  5. 6. known as the most important gland; has to do with growth and development
  6. 8. at the resting state there are more negatively charges ions inside the cell
  7. 9. neurons within the brain and spinal cord that communicate internally and process information between the sensory inputs and motor outputs
  8. 10. a layer of fat that protects the axon body, and can speed up neural impulses
  9. 11. neurotransmitters that send signals to calm down the cell; decrease likelihood of an action potential
  10. 14. neurotransmitter that sends signals to stimulate the cell; increase likelihood of an action potential
  11. 15. the brain and spinal cord
  12. 16. the division of the peripheral nervous system that controls the body's skeletal muscles
  13. 18. are caused by the over or under production of hormones
  14. 19. the division of the autonomic nervous system that used the body's energy; fight
  15. 20. bundled axons that form neural cables connecting the CNS with muscles, glands, and sense organs
  16. 26. the body's chemical communication system; a set of glands that secretes hormones into the bloodstream
  17. 27. the body's speedy, electrochemical communication network, consisting of all the nerve cells of the peripheral and central nervous system
  18. 28. when the cell channels open up, allowing the positively charged ions to rush in and the negatively charged ions to rush in
  19. 30. neurons branches that receive and integrate messages, conducting impulses down toward the cell body
  20. 31. a molecule that blocks neurotransmitter's action
  21. 35. the removal of a neurotransmitter by waiting for it to float away from the cell