Neurons
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1. | a cell body: contains the nucleus and is the place where macromolecules are produced | |||
2. | dendrites: thin branched processes that extend from the cytoplasm of the cell body. Serve as receptive elements that transmit electrica impluses to the cell body | |||
3. | an axon: is the longer process; transmits signals away from the cell body. | |||
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Classification of Neurons | ||||
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i. | Sensory (Afferent) Neurons conduct impulses from the sensory receptors to the central nervous system. | |||
ii. | Motor (Efferent) Neurons conduct impluses from the CNS to the muscles and glands. | |||
iii. | Association Neurons (Interneurons) located entirely within the CNS and have integrattive or associative functions. | |||
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i. | Bipolar Neurons have two processes, one at either end. | |||
ii. | Multipolar Neurons have several dendrites and one axon extending from the cell body; most numerous of the neurons | |||
iii. | Pseudounipolar Neurons have a single process that divides like a T to form a longer process. |
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