Nervous System

Nervous System PowerPoint PPT Presentation


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Nervous System

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1. Nervous System Maintains homeostasis by controlling all of the systems of the body.

2. Neuron = Nerve Cell Dendrite = Receives information and passes it to the cell body Cell Body = Location of nucleus and organelles Axon = Single portion that carries information away from cell body

3. 3 Types of Neurons Sensory Neuron receives information. Interneuron processes information. Brain and spinal cord Motor Neuron cause action in muscles or glands.

4. Types of Sensory Neurons Mechanoreceptors responds to movement & pressure. (skin, touch, hear) Thermoreceptors responds to heat loss or gain. (skin touch) Pain receptors responds to tissue damage. (skin, touch) Chemoreceptors nerves that respond to chemicals. (Taste, smell, nose, mouth) Photoreceptors = nerves that respond to light. (sight, eyes)

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