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