21.3-21.5 Vocabulary

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Across
  1. 3. The _________ nervous system is responsible for skeletal muscle contraction which is usually voluntary.
  2. 6. The ________ nervous system consists of the brain and spinal cord.
  3. 7. ________ ____________ is one of the major pain pathways from receptor to celebral sensory cortex.
  4. 8. The CNS also has layered groups of connected neurons called ______.
  5. 10. The third type of neurons, __________, transmit signals from one neuron to another within the CNS.
  6. 12. The brain stem, also called the ________, regulates vital involuntary functions such as heart rate, contractions of blood vessels and the rate of breathe.
  7. 13. The _______ _______ is a membrane which surrounds the neurons in vertebrate animals.
  8. 15. The glial cells, or ____, are generally smaller than neurons.
Down
  1. 1. Gaps between neighboring Schwann cells are known as _____ __ _______.
  2. 2. Cell bodies of neurons form aggregations called ________ in the PNS.
  3. 4. The __________ nervous system carries information between the other organs and the another nervous system.
  4. 5. The __________ mainly coordinates contractions of the skeletal muscles.
  5. 7. The _________ system reduces an animal’s readiness for action, slows the heart, and stimulates homeostatic activities such as digestion.
  6. 9. The _________ system prepares an animal for quick action.
  7. 11. Cell bodies of neurons form aggregations in the PNS and _____ in the CNS.
  8. 13. Protective membranes called ________ cover the brain and spinal cord.
  9. 14. The __________ nervous system is responsible for involuntary responses, such as changes in the activities of glands and the digestive system.