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)