Nervous System

2. consists of the brain and spinal cord
4. non-neuronal cells that do not produce electrical impulses.
7. do not have motor or sensory functions; they just act to pass on information
9. regulates certain body processes, such as blood pressure and the rate of breathing.
10. a membrane receptor protein that is activated by a neurotransmitter
15. fundamental units of the nervous system
17. part of the peripheral nervous system associated with the voluntary control of body movements via skeletal muscles.
19. mo tor neurons that carry neural impulses away from the central nervous system and towards muscles to cause movement.
21. Specialized projections called axons allow neurons to transmit electrical and chemical signals to other cells.
23. small swellings that are found at the terminal ends of axons.
24. a specialized area of membrane of the axon terminal that faces the plasma membrane of the neuron or muscle fiber

1. The receiving part of the neuron.
3. large granular body found in neurons
4. chemical substances made by the neuron specifically to transmit a message
5. insulating layer, or sheath that forms around nerves, including those in the brain and spinal cord.
6. the nucleus-containing central part of a neuron exclusive of its axons and dendrites
8. sensory neurons that carry nerve impulses from sensory stimuli towards the central nervous system and brain
10. a sensory receptor which receives stimuli from within the body
11. a whitish fiber or bundle of fibers that transmits impulses of sensation to the brain or spinal cord
12. the membrane that receives a signal (binds neurotransmitter) from the presynaptic cell
13. 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.
14. the site of transmission of electric nerve impulses between two nerve cells (neurons)
16. something that incites to action or exertion or quickens action, feeling, thought, etc.
18. a cluster of nerve bodies positioned along the spinal cord at the dorsal and ventral roots of a spinal nerve.
20. make up the nervous system of bilateral animals
22. the main glial cells of the peripheral nervous system