Parts of a Neuron

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Across
  1. 6. A rapid reaction to a stimulus mediated by the spinal cord or lower brain.
  2. 7. Detects a stimulus and initiates a nerve impulse
  3. 10. It carries nerve impulses from one part of the body to another
  4. 11. An organ or cell that produces a response to a stimulus
  5. 15. The neuron that sends messages between sensory neurons and motor neurons
  6. 16. Junction between two neurons or a junction between neurons and receptor or effector cells.
  7. 18. Sacs in the axon terminal that contain neurotransmitters, able to fuse with the membrane of the axon terminal in order to release their contents into the synaptic cleft.
  8. 19. The end of the neuron where the electrical nerve impulse finishes prior to the synapse
  9. 21. A molecule that is released from the synaptic terminal of a neuron at a synapse and diffuses across to another cell
  10. 22. cell body, contains nucleas
  11. 23. the organ that is part of the CNS encased in the cranium
  12. 24. A change in the environment that provokes a response in the organism
  13. 25. branching terminals that receive and relay the impulse TOWARD the soma
Down
  1. 1. Division of the peripheral nervous system (PNS) that contains all sensory neurons, and motor neurons to skeletal muscles.
  2. 2. gather information from the sensory receptors (senses) and send this sensory information as impulses TOWARDS the central nervous system.
  3. 3. Part of the central nervous system that is below the brain and enclosed within vertebra.
  4. 4. The neuron that sends information AWAY from the central nervous system to effector
  5. 5. (PNS)All the nerves that do not form the central nervous system (brain and spinal cord): sensory receptors sensory neurons and motor neurons.
  6. 8. Long threadlike part of a neuron which conducts impulses away from the soma
  7. 9. (CNS)The brain and spinal cord.
  8. 12. An insulating coat of cell membrane over axons
  9. 13. Many individual neurons group together into a single structure.
  10. 14. The reflex process
  11. 17. A reaction or change in an organism as a result of a stimulus
  12. 20. Branch of the peripheral nervous system which is involuntary and regulates internal processes without our awareness