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22 Cards in this Set
- Front
- Back
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central nervous systems consists of
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brain and spinal cord
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peripheral nervous systems consists of
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sensory receptors, effector cells, and nerves
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membrane potential
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charge difference between the cytoplasm and extracellular fluid
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when a nueron makes a change in membrane potential...
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an impulse is created
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three major functions of the system
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input, integration, motor output
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input
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information about extrernal and internal environment received by sensory receptors
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integration
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interpretation of sensory signals within neural precessing centers in the CNS
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motor outpit
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conduction of signals from the integration center to effector cells
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relex
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an automatic response
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relex arc
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a nerce circuit
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sensory neuron
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receives info from a sensory receptor from change in light pressure and passes on infor to motor neuron
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motor neuron
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signals muscle cell to carry out the response
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interneuoron
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inhibit motor neurons to flex muscles, preventing them from contracting
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peripheral nercous systems neurons
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stem from the brain and spinal cord, go thru arms and legs
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peripheral nercous systems CONTROLS
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ibnvoluntary activitees: things you cant cant control
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somatic nervous system controls
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voluntarily activites-things you think about
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cerebrum
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controls coluntry activites-receieves /interprets infor-largest part of human brain
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cerebellum
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control muscular activity
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hypothalamus
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regulates homeostasis, secretes hormones, and regulates pituitary gland`
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medulla
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controls involuntary activ.-breathing
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parasympathetic
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calms body down-contricts pupil
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sympathetic
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requires more energy, increases hrt rate, and dilates pupil
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