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22 Cards in this Set

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