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20 Cards in this Set
- Front
- Back
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Neuron
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cell,moves electrical enrgy
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Impulse
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electrical message,passes on nureon
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Receptor
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cell,detects changes in and out of the body
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Nerve
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bundle of axon,blood vessels and connective tissue
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brain
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mass of tissue, main organ of the nervous system
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reflex
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involuntary response to a stimulus
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cerebellum
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part of the brain that keeps track of the bodys position
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cerebrum
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the part of the brain that detects sensory perseption, keeps track of voluntary acts
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medulla
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part of the brain that connects to the spinal cord and controls many involuntary proccesses
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axon
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long cell fiber, transfers intercellular messages
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dendrite
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short branched extension of a neuron, recivies impulses from other cells
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motor neuron
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sends impulses from the brain and spinal cord to other systems
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sensory neuron
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gathers information about what is happening in and around the body and sends on to central nervous system
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retina
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layer of light sensitive cells in back of the eye
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rods
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photoreceptors that detect very dim light
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cones
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photoreceptors that detect bright light and help you see colors
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iris
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colored part of the eye
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cochlea
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ear organ converts sound waves into dectrical impulses
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lens
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curved transparent object forms an image by refracting light
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olfactory cells
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smelling cell
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