Neurons, the Nervous System, and the Endocrine System

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Across
  1. 1. nerves that carry information away from the CNS to the PNS
  2. 3. sacs that contain neurotransmitters and are located in the axon terminals
  3. 4. the glands in the autonomic nervous system that are calming
  4. 6. part of the PNS that controls self regulated action of internal organs and glands
  5. 8. the stage when a neuron is more likely to fire an action potential. This occurs in excitatory neurotransmitters
  6. 11. state of when a neuron is in resting state and has a slightly higher concentration of negatively charged ions
  7. 13. when a neuron is inactive and cannot create an action potential
  8. 19. the law that states that each action potential has the same amplitude independently from the strength or the stimulus
  9. 20. the glands in the autonomic nervous system that are arousing
  10. 22. nerves that carry signals toward the CNS from the PNS
  11. 25. short period after a neuron releases an action potential and is no longer able to create another one. The charge inside the neuron drops too low before restoring itself to normal
  12. 26. when the neurotransmitter is removed by breaking apart from the rest of the cell
  13. 27. when a neuron is polarized, the neuron creates a slight negative charge inside the neuron which causes this
  14. 29. nerve cells that make up the nervous system. They receive information from other neurons, carry information down its length, and pass information onto other neurons, muscles, and glands
  15. 30. when the cell is stimulated, channels in the cell membrane open, which allows positively charged ions to enter the cell and negative ions to leave
  16. 31. a chemical that mimics neurotransmitters and slows down the process of neurotransmitters being reabsorbed from the synapse
  17. 33. type of neurons that take information from sensory receptors to the central nervous system (the brain and spinal cord)
  18. 34. study of the intersections between biology and human behavior
  19. 35. a chemical messenger that takes information from neurons to other neurons or from neurons to muscles
  20. 36. synapse when this is activated in an excitatory neurotransmitter, the neuron that is receiving information becomes depolarized
  21. 37. part of the PNS that controls voluntary movements of skeletal muscles
Down
  1. 1. a type of neurotransmitter that sends messages to the cell that stimulate or arouse it in order to fire an action potential
  2. 2. This is the phase of neurotransmitter information transfer that makes the neuron less likely to reach the threshold and fire an action potential. This occurs in inhibitory neurotransmitters
  3. 5. the tiny gap at the junction between the axon tip of the sending neuron and the dendrite of the receiving neuron
  4. 7. an electrical signal that allows neurons to communicate
  5. 9. when the neuron is removed from the cell by putting it back in the vesicle
  6. 10. the process when neurons try to restore their charge by releasing positive ions from their membrane and trying to bring back negative ions
  7. 12. These neurons exist within the brain and spinal cord
  8. 14. the part of the nervous system that regulates movements and sends messages to the brain and spinal cord
  9. 15. a chemical that blocks the receptor sites and speeds up the removal of neurotransmitters from the synapse. This chemical also decreases the production of neurotransmitters.
  10. 16. a type of neurotransmitter that sends messages to calm the cell and help prevent the cell from firing an action potential
  11. 17. division of the peripheral nervous system that controls the body's skeletal muscles
  12. 18. when the neurotransmitter is removed by waiting for it to wander away
  13. 21. the part of the nervous system that is comprised of the brain and spinal cord
  14. 23. type of neuron that carry information from from the brain and spinal cord to the muscles and glands
  15. 24. the intersection between the axon top of the sending neuron and the dendrite or cell body of the receiving neuron
  16. 28. if this limit is reached, another action potential will occur
  17. 32. synapse when this is activated, the neuron that is receiving information from another neuron after it fires an action potential becomes hyper polarized