01:119:116 Lecture Notes - Lecture 18: Spinal Cord, White Matter, Efferent Nerve Fiber

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Detect stimuli changes within or outside body that can be detected by organism. Respond process info and communicate info to and from all parts of the body. Nerves: communicate signals between cns and rest of body. Functional unit of the nervous system: the neuron. Conduct messages in form of electrical signals and integrate information. Diversity of shapes and sizes depending on exact function but all share basic structural characteristics. Contains all typical cellular organelles: nucleus, mitochondria, Receive information from environment or from another neuron. Most neurons have many short, branched dendrites. Transmits neural impulse away from cell body to either. Effector part of organism that produces response to stimulus. Usually only one long axon can be >1m in large animals. Axon hillock cone-shaped base of axon where extends from cell body location where signals are generated. End of axon usually divides into many branches at tips of branches are synaptic terminals.

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