Nervous System

5. Generally conducts impulses away from the cell body
7. Chemicals released by neurons, muscles, or glands
8. Neuron that conducts impulses toward the CNS from the body periphery
9. Specialized cells that myelin ate the fibers of neurons found in the PNS
10. Changes, occurring within or outside the body, that affect nervous system functioning
11. Contains autonomic centers, which regulate blood pressure and respiratory rhythm, as well as coughing and sneezing
12. Increases the speed of impulse transmission
13. Junction or point of close contact between neurons
17. Neuron, serving as part of the conduction pathway between sensory and motor neurons
18. Bundle of nerve processes inside the CNS
20. Gaps in a myelin sheath
21. Contains reflex centers involved in regulating respiratory rhythm in conjunction with lower brain-stem centers
22. Large fiber tract connecting the cerebral hemispheres
24. The resting potential is reversed as sodium ions rush into the neuron

1. Neuron that conducts impulses away from the CNS to muscles and glands
2. Site of regulation of water balance and body temperature
3. Conducts electrical currents toward the cell body
4. Sensory receptors found in the skin, which are specialized to detect temperature, pressure changes, and pain
6. Releases neurotransmitters
14. Collection of nerve cell bodies found outside the CNS
15. Sensory receptors found in muscle and tendons that detect their degree of stretch
16. Important relay station for afferent fibers traveling to the sensory cortex for interpretation
19. responsible for the regulation of posture and coordination of skeletal muscle movements
23. Location of the nucleus
24. Outermost covering of the brain, composed of tough fibrous connective tissue