Across
- 1. nerves that carry information away from the CNS to the PNS
- 3. sacs that contain neurotransmitters and are located in the axon terminals
- 4. the glands in the autonomic nervous system that are calming
- 6. part of the PNS that controls self regulated action of internal organs and glands
- 8. the stage when a neuron is more likely to fire an action potential. This occurs in excitatory neurotransmitters
- 11. state of when a neuron is in resting state and has a slightly higher concentration of negatively charged ions
- 13. when a neuron is inactive and cannot create an action potential
- 19. the law that states that each action potential has the same amplitude independently from the strength or the stimulus
- 20. the glands in the autonomic nervous system that are arousing
- 22. nerves that carry signals toward the CNS from the PNS
- 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
- 26. when the neurotransmitter is removed by breaking apart from the rest of the cell
- 27. when a neuron is polarized, the neuron creates a slight negative charge inside the neuron which causes this
- 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
- 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
- 31. a chemical that mimics neurotransmitters and slows down the process of neurotransmitters being reabsorbed from the synapse
- 33. type of neurons that take information from sensory receptors to the central nervous system (the brain and spinal cord)
- 34. study of the intersections between biology and human behavior
- 35. a chemical messenger that takes information from neurons to other neurons or from neurons to muscles
- 36. synapse when this is activated in an excitatory neurotransmitter, the neuron that is receiving information becomes depolarized
- 37. part of the PNS that controls voluntary movements of skeletal muscles
Down
- 1. a type of neurotransmitter that sends messages to the cell that stimulate or arouse it in order to fire an action potential
- 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
- 5. the tiny gap at the junction between the axon tip of the sending neuron and the dendrite of the receiving neuron
- 7. an electrical signal that allows neurons to communicate
- 9. when the neuron is removed from the cell by putting it back in the vesicle
- 10. the process when neurons try to restore their charge by releasing positive ions from their membrane and trying to bring back negative ions
- 12. These neurons exist within the brain and spinal cord
- 14. the part of the nervous system that regulates movements and sends messages to the brain and spinal cord
- 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.
- 16. a type of neurotransmitter that sends messages to calm the cell and help prevent the cell from firing an action potential
- 17. division of the peripheral nervous system that controls the body's skeletal muscles
- 18. when the neurotransmitter is removed by waiting for it to wander away
- 21. the part of the nervous system that is comprised of the brain and spinal cord
- 23. type of neuron that carry information from from the brain and spinal cord to the muscles and glands
- 24. the intersection between the axon top of the sending neuron and the dendrite or cell body of the receiving neuron
- 28. if this limit is reached, another action potential will occur
- 32. synapse when this is activated, the neuron that is receiving information from another neuron after it fires an action potential becomes hyper polarized