Nervous system

6. fundamental units of the nervous system
8. a sensory receptor which receives stimuli from within the body
9. a membrane receptor protein that is activated by a neurotransmitter
12. make up the nervous system of bilateral animals
18. sensory neurons that carry nerve impulses from sensory stimuli towards the central nervous system and brain
19. chemical substances made by the neuron specifically to transmit a message
21. something that incites to action or exertion or quickens action, feeling, thought, etc.
22. a whitish fiber of bundle of fibers that transmits impulses of sensation to the brain or spinal cord
23. Regulates certain body processes, such as blood pressure and the rate of breathing.
24. The receiving part of the neuron.
25. a cluster of nerve bodies positioned along the spinal cord at the dorsal and ventral roots of a spinal nerve.

1. the site of transmission of electric nerve impulses between two nerve cells (neurons)
2. large granular body found in neurons
3. non-neuronal cells that do not produce electrical impulses.
4. insulating layer, or sheath that forms around nerves, including those in the brain and spinal cord.
5. the membrane that receives a signal (binds neurotransmitter) from the presynaptic cell
7. part of the peripheral nervous system associated with the voluntary control of body movements via skeletal muscles.
9. a specialized area of membrane of the axon terminal that faces the plasma membrane of the neuron or muscle fiber
10. Specialized projections called axons allow neurons to transmit electrical and chemical signals to other cells.
11. do not have motor or sensory functions; they just act to pass on information
13. motor neurons that carry neural impulses away from the central nervous system and towards muscles to cause movement.
14. small swellings that are found at the terminal ends of axons.
15. the nucleus-containing central part of a neuron exclusive of its axons and dendrites
16. consists of the brain and spinal cord
17. Because the myelin sheath is largely composed of an insulating fatty substance, the nodes of Ranvier allow the generation of a fast electrical impulse along the axon.
20. the main glial cells of the peripheral nervous system