Nervous System Introduction

Edit Answers
123456789101112131415161718192021222324252627
Across
  1. 1. Release neurotransmitters to communicate with other cells. (2 words)
  2. 3. Form myelin sheaths around PNS axons.(2 words)
  3. 6. Controls voluntary movements of skeletal muscles and conscious sensory information.
  4. 12. Single process that splits into two branches; common sensory neurons.
  5. 13. Act as immune cells; remove debris and pathogens in the CNS.
  6. 15. Consists of the brain and spinal cord; processes and integrates information.
  7. 17. Chemical messengers that transmit signals across synapses.
  8. 18. Carries sensory information toward the CNS.
  9. 19. Excitable cells that transmit electrical signals.
  10. 21. Receive incoming signals from other neurons.
  11. 23. Surround neuron cell bodies in ganglia and regulate their environment.(2 words)
  12. 26. Carries motor commands away from the CNS to muscles or glands.
  13. 27. Line ventricles of the brain and produce cerebrospinal fluid (CSF). (2 words)
Down
  1. 2. Regulates involuntary activities such as heart rate, digestion, and gland activity.
  2. 4. Clusters of neuron cell bodies in the PNS.
  3. 5. Neurons that connect sensory and motor neurons within the CNS.
  4. 7. Form myelin sheaths around CNS axons.
  5. 8. One axon and many dendrites; most common type.
  6. 9. Small gap between neurons where neurotransmitters travel. (2 words)
  7. 10. Fatty insulating layer that increases signal speed.(2 words)
  8. 11. Gaps in the myelin sheath that allow rapid impulse conduction. (3 words)
  9. 14. Contains the nucleus; controls neuron metabolism.
  10. 16. Maintain the blood-brain barrier, regulate nutrients, and support neurons.
  11. 20. One axon and one dendrite; found in special senses. (2 words)
  12. 22. Includes all nerves outside the CNS; connects the CNS to the rest of the body.
  13. 24. Conduct electrical impulses away from the cell body.
  14. 25. Support cells that protect, nourish, and insulate neurons.