Across
- 2. the basic building block of the nervous system; receiving information
- 3. the collection of structures in the middle of the brain responsible for coordinating movement patterns, sleep, and arousal
- 5. part of a neuron that contains the cell nucleus and other structures that help the neuron carry out its functions
- 6. a substance that mimics and enhances a neurotransmitter's direct effect
- 7. a long, tube-like structure that conveys impulses away from a neuron's cell body
- 9. the part of the nervous system consisting of the brain and spinal cord
- 11. a chemical messenger released by neurons that travels across the synapse and allows neurons to communicate with one another
- 12. the small brain structure beneath the thalamus that helps govern drives and hormones
- 14. a subdivision of the PNS that connects the CNS to sensory receptors and controls skeletal muscles
- 17. immature cells that have the potential to develop into almost any type of cell
- 19. the brain's ability to reorganize and change its structure and function throughout the life span
- 20. branching fibers of neurons that receive neural impulses from other neurons
Down
- 1. the diffuse set of neurons that helps screen incoming information and controls arousal
- 4. the process by which new neurons are generated
- 8. the part of the nervous system composed of the nerves and neurons connecting the CNS to the rest of the body
- 10. a segment of DNA that occupies a specific place on a particular chromosome and carries the code for hereditary transmission
- 13. the process by which heritable traits that increase an organism's chances of survival
- 15. a substance that blocks normal neurotransmitter functioning
- 16. provide structural, nutritional, and other support for neurons
- 18. a chemical messengers manufactured and secreted by the endocrine glands