Across
- 4. Part of the autonomic nervous system that allows us to unwind and conserve energy. Also referred to as the resting and digesting system
- 5. Nervous system subdivision that is composed of the brain and spinal cord.
- 9. End of neuron that releases neurotransmitters away from the cell body.
- 10. Neuron that conducts impulses toward the CNS from the body periphery.
- 12. Part of the autonomic nervous system that mobilizes the body during extreme situations. (fear, exercise, or rage)
- 13. Specialized cells that myelinate the fibers of neurons found in the PNS.
- 14. Large califlower-like structure that projects dorsally from under the cerebrum. Provides precise timing for skeletal muscle activity and controls balance and equilibrium.
- 18. Nervous system subdivision is composed of the cranial nerves and spinal nerves.
- 19. Responsible for the regulation of posture and coordination of skeletal muscle movements.
- 23. Neuron that conducts impulses away from the CNS to muscles and glands
- 25. Found in the brain stem, contains autonomic centers which regulate blood pressure, heart rate, breathing, swallowing, and vomiting
- 26. Elevated ridges of tissue in the cerebral hemispheres.
- 27. Cells transmit an electrical message from one area of the body to another site.
Down
- 1. Approximately about 17 inches long, this protrusion is an extension of the brain stem and extends all the way to just below the ribs. Contains 31 pairs of spinal nerves and is enlarged at the lumbar and cervical region where nerves to the arms and legs arise and leave the cord.
- 2. Chemicals released by neurons that stimulate other neurons, muscles, or glands.
- 3. End of neuron that conducts electrical currents toward the cell body
- 6. Location of the nucleus in a neuron.
- 7. Gaps in the myelin sheath between Schwann cells.
- 8. Subdivision of the PNS that regulates the activity of the cardiac muscle, smooth muscle, and glands. It is also called the involuntary nervous system because it controls body activities automatically. It is essential in maintaining homeostasis for the body.
- 11. White, fatty material that covers long nerve fibers, protecting and insulating the fibers, as well as Increasing the speed of impulse transmission
- 13. Junction or point of close contact between neurons.
- 15. Subdivision of the PNS that controls voluntary activities such as the activation of skeletal muscles.
- 16. Cells support, insulate, and protect neurons. These cells are able to divide and are usually involved in brain tumors.
- 17. Watery broth similar in make up to blood plasma, but contains less protein and more vitamin C. Forms a watery cushion that protects fragile nervous tissue from blows and other trauma.
- 20. Important relay station for afferent fibers traveling to the sensory cortex for interpretation giving us a crude idea if the sensation we are about to feel will be pleasant or unpleasant.
- 21. Collection of nerve cell bodies found outside the CNS.
- 22. Site of regulation of water balance, body temperature, and metabolism.
- 24. Shallow grooves or furrows in the cerebral hemispheres.