Across
- 6. the section located below the cerebrum at the top of the brainstem and is responsible for conducting impulses between parts and for certain eye and auditory reflexes.
- 10. carries impulses from the CNS to effector organs, the muscles and the glands.
- 12. regulates events that are automatic or involuntary, such as the activity of smooth and cardiac muscle and glands.
- 13. dendrite endings o the sensory neurons that are activated by specific changes occurring.
- 15. a bundle of nerve fibers bound together by connective tissue.
- 16. important autonomic nervous system center because it plays a role in the regulation of body temperature, water balance, and metabolism.
- 20. glia wrap their flat extensions (processes) tightly around the nerve fibers, producing fatty insulating covering called myelin sheaths.
- 22. consists of the nerves that extend from the brain and spinal cord.
- 23. a white, fatty lipid substance that covers most long nerve fibers.
- 27. a condition where the head is enlarged as the brain increases in size.
- 30. or interbrain that sits atop the brain stem and is enclosed by the cerebral hemispheres.
- 32. brain and spinal cord. acts as the integrating command centers o the nervous system.
- 34. the rounded structure that protrudes just below the midbrain, it is the area that is mainly fiber tracts, and has important nuclei involved in the control of breathing.
- 35. neuron process that convey incoming messages (electrical signals) toward the cell body.
- 36. slight brain injury where victim may be dizzy or lose consciousness briefly.
- 37. a coarser connective tissue that wraps and binds groups of neuron fibers.
- 39. connect the motor and sensory neurons in neural pathways.
- 40. the three connective tissue membranes covering and protecting the CNS structures.
- 41. are rapid, predictable and involuntary response to stimuli.
- 42. allows us to voluntarily control our skeletal muscles.
Down
- 1. transmit messages (nerve impulses) from one part of the body to another.
- 2. tiny gap that separates the axon terminal from the next neuron.
- 3. shallow grooves of the cerebral hemispheres that separate gyri.
- 4. the outflow of positive ions (k+) from the cell restores the electrical conditions at the membrane to the polarized, or resting state.
- 5. is around the brain and cord that forms a watery cushion that protects the nervous tissue from trauma.
- 7. keeps the CNS constantly informed of events going on both inside and outside the body.
- 8. inward rush of sodium ions changes the polarity of the neurons membrane at that site.
- 9. monitors health of nearby neurons and dispose of debris.
- 11. forms the roof of the third ventricle.
- 12. neuron process that generates the nerve impulses and typically conduct them away from the cell body.
- 14. deeper grooves that separate large regions of the brain.
- 17. plasma membrane of a resting/inactive neuron.
- 18. sensory receptors in the muscles and tendons that detect the amount of stretch, or tension, in skeletal muscles.
- 19. elevated ridges of tissues on the entire surface of the cerebral hemispheres.
- 21. bundle of neuronal processes (axons) outside the CNS.
- 24. encloses the shallow third ventricle of the brain.
- 25. a delicate connective tissue sheath that surrounds neuron fibers.
- 26. includes many types of cells that generally support, insulate, and protect the delicate neurons.
- 28. brace neurons and anchor them to their nutrient supply lines.
- 29. result of marked tissue destruction and always result in a coma lasting from hours to a lifetime due to injury to the reticular activating system.
- 31. it processes and interprets the sensory input and decides what should be done at each moment.
- 33. a tough fibrous sheath that binds the fascicles together to form the cordlike nerve.
- 36. the largest part of the brain; consists of right and left cerebral hemispheres.
- 38. responsible for muscle coordination, balance, posture, and muscle tone.