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27 Cards in this Set
- Front
- Back
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What does the nervous system do?
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- Receives info. about what is happening inside and out of your body
-directs the way in which your body responds to the info. -maintains homeostasis |
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What is a stimulus?
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Any change or signal in the environment that can make an organism react
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What is a response?
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What your body does in reaction to a stimulus
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What are neurons?
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The cell sthat carry info. through your nervous system
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What is a nerve impulse?
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The message that a nueron carries
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Does a neuron have a nucleus?
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Yes
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What is a dendrite?
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A threadlike extension that carries impulses toward the cell body
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What is an axon?
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An extension that carries impulses away from the cell body
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On the nueron what is the path the nerve impulse takes?
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begin in dendrite>to cell body>down axon>axon tips
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Can an axon have more than one tip?
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Yes
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Can a nueron have more than one dendrite?
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Yes
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Can there bemore than one saxon on a neuron?
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No
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What is a nerve?
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a bundle of nerve fibers(axons and dendrites)
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How many types of neurons are found in the body?
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three
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What are the three types of neurons?
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Sensory, inter, and motor
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What does a sensory neuron do?
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It picks up stimuli from the internal and external environment and converts each stimulus into a nerve impulse
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What does an internueron do?
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Carries nerve impulses from one neuron to another
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What does a motor neuron do?
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Sends an impulse to a muscele and the muscle contracts in response
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What is the order the nerve impulse travels?
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Sensory neron>brain or spinal cord>interneuron>motor
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What form does the nerve impulse travel along the neuron in?
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electrical and chemical signals
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What is a synapse?
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A tiny space between each axon tip and the next structure
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How does the nerve impulse cross the synapse to get to the next structure?
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The axon tips release chemicals that carry the impulses accross
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How many divisions of the nervous system are there and what are they?
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Two:Peripheral and Central
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What does the central nervous system consist of?
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Brain and spinal cord
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What does the peripheral nervous system consist of?
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All the nerves located outside of the central nervous system
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What is the central nervous system?
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The control vcenter of your body?
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What is the brain and where is it located?
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In the skull, it is the part of the CNS that controls most functions in the body?
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