NERVOUS TISSUE

2. The medullary sheath is interrupted at intervals by the_______of Ranvier.
4. Nervous tissue also includes cells that do not________impulses, but instead support the activities of the neurons.
6. Dendrites are extensions, or processes, of the_________that carry impulses to the cell body.
9. In the peripheral nervous system, Schwann cells are neuroglia cells that_______neuronal function by increasing the speed of impulse propagation.
11. A typical neuron displays a distinctive_________.
13. Supporting, or glia, cells bind neurons together and_______the neurons.
16. The axons are responsible for transmitting impulses over_______distances from cell body.
17. The main part of the cell, the part that carries on the_________functions, is the cell body.
21. The axon is surrounded by a whitish, fatty layer called the_______sheath.
23. The signal is transmitted across the synapse by chemical compounds known as_________.
24. Neuroglia or glial cells, which have been characterized as having a________support role.
26. _______are supporting cells that provide physical sport, remove debris, and provide electrical insulation.
27. A typical neuron consists of dendrites, the cell body, and an_______.
28. When a neuron is sufficiently stimulated, it generates an action________that propagates down the axon towards the synapse.

1. Nervous tissue contains_______categories of cells.
3. If enough neurotransmitters are released at the synapse to_________the next neuron.
5. The cell body is like a_______for the neuron.
7. The Schwann cells are underlain by the_______sheath.
8. _______are highly specialized nerve cells that generate and conduct nerve impulses.
10. The________is the gap between nerve cells, or between a nerve cell and its target.
11. Neurons categorized as________neurons have several dendrites and a single prominent axon.
12. _________neurons possess a single dendrite and axon with the cell body.
14. Dendrites are responsible for responding to_______.
15. Unipolar neurons have only a single process_________out from the cell body.
18. irritability and conductivity are their two major________characteristics.
19. Integration and________are the two major functions of nervous tissue.
20. Outside the myelin sheath there is a cellular layer called the________.
21. It stimulates________contraction, creates an awareness of the environment, and plays a major role in emotions, memory, and reasoning.
22. Nervous tissue responsible for coordinating and________many body activities.
25. Dendrites, which receive input from other neurons,_______off the cell body and appear as thin extensions.