Anatomy Crossword

6. long nerve fiber that conducts away from the cell body of the neuron
10. highly branched extensions that receive signals from other neurons
11. body contains most of the neuron’s organelles and its nucleus
12. the junction between two neurons or between a neuron and a muscle
15. chemical messengers that cross the synaptic gaps between neurons
17. a cluster of nerve cell bodies, often similar functions, located in the PNS
19. important neurotransmitters in the CNS that acts on the sympathetic nervous system
20. neurotransmitters secreted by the adrenal medulla in response to stress
21. nervous system the sensory and motor neurons that connect the CNS to the rest of the body

1. the little brain attached to the rear of the brain stem that helps coordinate voluntary movement and balance
2. cells cells in the nervous system that supports, nourish, and protect neurons
3. division a branch of the autonomic nervous system that maintains normal body functions; calms the body
4. largest part of the brain; responsible for voluntary muscular activities
5. neurons neurons that carry incoming information from the sense receptors to the central nervous system
7. structural and functional unit of the unit system
8. division the part of the autonomic nervous system that arouses the body to deal with perceived threats
9. nervous system includes the brain and spinal cord
13. sheath a layer of electrical insulation that surrounds the axon
14. the oldest part and central core of the brain, responsible for automatic survival functions
16. natural hormones that decreases pain perception
18. a neurotransmitter that affects hunger, sleep, arousal, and mood