Across
- 2. the network of nerves and supporting structures that connect the brain and spinal cord to all of the other parts of the body
- 5. motor nerves that carry impulses from the central nervous system to muscles or glands in the periphery of the body
- 9. the part of the brain that coordinates all movement, muscle activity and balance
- 10. largest part of the brain composed of four lobes that receive and store information
- 12. part of the brain that dictates multiple life functions; the continuation of the spinal cord within the skull, forming the lowest part of the brainstem and containing control centers for the heart and lungs
- 14. a nerve cell; a specialized cell that receives, processes and conducts electrical impulses from one part of the body to another
- 15. paler tissue of brain and spinal cord, primarily composed of nerve fibers with myelin sheaths
- 17. the brain and spinal cord together
- 19. sensory nerves that carry external stimuli information from the periphery to the central nervous system
- 20. most primitive part of the brain that contains the cerebellum, pons and medulla oblongata
- 22. pathway for all impulses going to and from the brain
- 23. connection of the forebrain to the hindbrain
- 24. junction of the upper and lower eyelids on the medial side of the eye
Down
- 1. connects the brain to the spinal cord
- 3. brain portion that serves as a link between the nervous system and the endocrine system; a region of the forebrain below the thalamus that coordinates both the autonomic nervous system and the activity of the pituitary gland to control body temperature, thirst, hunger and other homeostatic systems; involved in sleep and emotional activity
- 4. bundles of axons that convey messages between the central nervous system and other parts of the body
- 6. awareness of skeletal position in regards to itself and to the external environment; the unconscious perception of movement and spatial orientation arising from stimuli within the body itself. In humans, these stimuli are detected by nerves within the body, as well as by the semicircular canals of the inner ear.
- 7. branchlike extensions that receive information from receptors or oncoming impulses from other neurons; short branched extensions of nerve cells, along which impulses received from other cells at synapses are transmitted to the cell body
- 8. a specialized cell membrane within a neuron that conducts electrical impulses; each neuron has one axon; a long fiber of a neuron that acts somewhat like a fiber-optic cable to carry outgoing or efferent messages
- 11. junction of the upper and lower eyelids on the lateral side of the eye
- 13. darker tissue of the brain and spinal cord, composed primarily of neuron cell bodies and dendrites
- 14. chemicals that carry the nerve impulse from the axon to another nerve, muscle or gland. Examples include acetylcholine and norepinephrine.
- 16. advance portion of the brain that contains the cerebral hemispheres, thalamus and hypothalamus
- 18. a protective insulating sheath or covering of the axon that allows very rapid transmission of nerve impulses
- 21. junction between neurons that assists in impulse movement; a minute gap across which impulses pass by diffusion of a neurotransmitter