Nervous Tissue
Across
- 4. The________is the gap between nerve cells, or between a nerve cell and its target.
- 5. There are______types of neuroglia.
- 6. Neuroglia or glial cells, which have been characterized as having a________support role.
- 7. Nervous tissue contains_______categories of cells.
- 9. When a neuron is sufficiently stimulated, it generates an action________that propagates down the axon towards the synapse.
- 12. If enough neurotransmitters are released at the synapse to_________the next neuron.
- 14. The Schwann cells are underlain by the_______sheath.
- 15. A typical neuron consists of dendrites, the cell body, and an_______.
- 16. Dendrites, which receive input from other neurons,_______off the cell body and appear as thin extensions.
- 17. The main part of the cell, the part that carries on the_________functions, is the cell body.
- 19. irritability and conductivity are their two major________characteristics.
- 21. Dendrites are responsible for responding to_______.
- 23. Nervous tissue responsible for coordinating and________many body activities.
- 24. The signal is transmitted across the synapse by chemical compounds known as_________.
- 25. A typical neuron displays a distinctive_________.
- 26. _______are supporting cells that provide physical sport, remove debris, and provide electrical insulation.
- 28. _________neurons possess a single dendrite and axon with the cell body.
- 29. The cell body is like a_______for the neuron.
Down
- 1. The medullary sheath is interrupted at intervals by the_______of Ranvier.
- 2. The axons are responsible for transmitting impulses over_______distances from cell body.
- 3. It stimulates________contraction, creates an awareness of the environment, and plays a major role in emotions, memory, and reasoning.
- 4. In the peripheral nervous system, Schwann cells are neuroglia cells that_______neuronal function by increasing the speed of impulse propagation.
- 8. _______are highly specialized nerve cells that generate and conduct nerve impulses.
- 10. Outside the myelin sheath there is a cellular layer called the________.
- 11. Dendrites are extensions, or processes, of the_________that carry impulses to the cell body.
- 13. Unipolar neurons have only a single process_________out from the cell body.
- 14. The axon is surrounded by a whitish, fatty layer called the_______sheath.
- 18. Integration and________are the two major functions of nervous tissue.
- 20. Neurons categorized as________neurons have several dendrites and a single prominent axon.
- 22. Nervous tissue also includes cells that do not________impulses, but instead support the activities of the neurons.
- 27. Supporting, or glia, cells bind neurons together and_______the neurons.