HMB200H1 Chapter Notes - Chapter 2: Axon Hillock, 10 Nanometer, Cerebral Cortex
1 May 2014
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Document Summary
Structure of different types of cells in the nervous system: neurons most important cells for the unique functions of the brain. Sense changes in the environment, communicate these changes to other neurons and command the body"s responses to these sensations. 10% of brain cells are neurons: glia outnumbers neurons by tenfold. Contributes to brain function mainly by insulating, supporting and nourishing neighboring neurons. Most cells are in the range of 0. 01-0. 05 mm in diameter. The stain is known as the nissl stain, useful for 2 reasons: distinguishes neurons and glia from one another, enables histologists to study the arrangement, or cytoarchitecture, of neurons in different parts of the brain. Central region that contains the cell nucleus. Numerous thin tubes that radiate away from the central region. The swollen region containing the cell nucleus has several names that are used interchangeably: cell body, soma, perikaryon.
