CNS lab - 1. Observe multipolar neurons on the giant...

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1. Observe multipolar neurons on the giant multipolar neuron slide. Draw a multipolar neuron as seen on the slide. Label the following: cell body, dendrites, and axon. Within the cell body identify the neuron- or cyto-plasm, nucleolus, and nucleoplasm. Note how the neuroplasm is darkly stained; it stains darkly because it contains rRNA. In nerve anatomy, these darkly stained ribosomes on the RER are called nissel bodies. Note how the nucleolus is also darkly stained. Why? a. The nucleus is also darkly stained because it also contains rRNA.
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2. Describe how an astrocyte is structurally distinct from a motor neuron. Astrocytes are considered a neuroglia, which means they are supportive cells that are located between the neurons. Motor neurons are cells that carry out primary functions, while forming a complex web of cells that receive and conduct impulses within the CNS. (Martini 2007, pgs 384-386)
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4. List the functions for each of the six types of glial cells. 1.) Astrocytes have a variety of functions, including: a.) The astrocytes create a Blood-Brain Barrier that isolates the CNS from the general circulation. b.) The microfilaments that are packed within the astrocytes extend across the breadth of the cell and its processes. Because of this extensive cytoskeleton the astrocytes are provided with reinforcement. This is handy in creating a Three-Dimensional Framework for the CNS. c.) Astrocytes moving into the site of damaged neural tissue can make repairs to structures which stabilize the tissue, preventing from further damage. Therefore, Repairing Damaged Neural Tissue. d.)
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This note was uploaded on 04/06/2008 for the course ANATOMY 101 taught by Professor Swanson during the Fall '07 term at Ithaca College.

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CNS lab - 1. Observe multipolar neurons on the giant...

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