Total Magnification
Fill in (complete each statement with the correct term)
1. The soma forms a cone-shaped _?_ as it projects to form an axon.
2. _?_ are small, distal branches of an axon.
3. Either Schwann cells or extensions of _?_ can form myelin sheaths.
4. The gaps between the segments of a myelin sheath are called _?_.
5. A group of myelinated fibers may form a region of nerve tissue called _?_ matter.
6. A junction between two neurons, or between a neuron and effector, is called a(n) _?_.
7. A bundle of parallel neuron fibers encased in fibrous connective tissue is called a(n) _?_ (in the PNS).
8. An action potential traveling down a myelinated axon travels _?_ (faster/slower) than in an unmyelinated axon.
9. Unmyelinated nerve tissue is called _?_ matter.
10. _?_ neurons have exactly two projections from the cell body.
11. _?_ neurons have multiple dendrites and a single axon extending from the cell body.
12. In _?_ neurons, a single process from the cell body diverges to form two long branches-one acting as a dendrite and the other as an axon.
13. Schwann cells form myelin sheaths in the _?_ nervous system.
14. Oligodendrocytes form myelin sheaths in the _?_ nervous system.
15. Neuroglial cells called _?_ cells line the fluid spaces of the brain.
16. Small glial cells that phagocytize harmful matter are called _?_.
17. _?_ are ciliated neuroglia that assist the circulation of CSF.
18. Of the two major types of cells in nerve tissue, the _?_ is the most numerous.