Vocabulary

3. large granular body found in neurons
5. a junction between two nerve cells
12. interact with receptor proteins on the membrane of the postsynaptic cell
14. a short branched extension of a nerve cell
17. a chemical substance that is released at the end of a nerve fiber by the arrival of a nerve impulse
18. a sensory receptor which receives stimuli from within the body
19. a gap in the myelin sheath of a nerve
21. an insulating layer that forms around nerves
23. terminal neurotransmitters are stored there to communicate with other neurons via these synapses
25. sensory neurons that carry nerve impulses from sensory stimuli towards the central nervous system and brain
26. spherical part of the neuron that contains the nucleus

1. fundamental units of the brain and nervous system
2. the membrane that receives a signal from the presynaptic cell and has two ways of responding
4. part of the peripheral nervous system associated with the voluntary control of body movements
6. nerves responsible for carrying signals away from the central nervous system in order to initiate an action
7. long, thin fibre carrying out-going signals
8. control system that acts largely unconsciously and regulates bodily functions
9. central nodes of neural circuits
10. specialized area of membrane of the axon terminal
11. the nervous system outside the brain and spinal cord
13. the complex of nerve tissues that controls the activities of the body. In vertebrates it comprises the brain and spinal cord
15. a structure containing a number of nerve cell bodies
16. diverse class of cells that provide developmental, physiological, and metabolic support for Neurons
20. type of glial cells of the peripheral nervous system that help form the myelin sheath around the nerve fibers
22. whitish fiber or bundle of fibers that transmits impulses of sensation to the brain
24. a thing or event that evokes a specific functional reaction in an organ or tissue