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Functions - Nervous System Functions Regulates internal...

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Nervous System Functions * Regulates internal body metabolism (internal environment) * body temp, urine volume, blood volume, gas exchange, circulation, movement * Llnk to the external environment- (interpreter) * sensory devices- sight, hearing, taste, smell, touch (pressure, pain, hot, cold) * emotional response to external stimuli (these drive desire to satisfy physical needs to preserve homeostasis) * hunger, thirst, temperature, rest, sexuality The Two Types of Neural Pathways * Sensory (afferent) nerves transmit messages from sensors to CNS * sensory receptors located the ends of peripheral nerves that detect external and internal environmental changes and relays info to brain * light and sound intensity * touch- changes in skin pressure * temperature variation * oxygen concentration in fluids of the body * impulses are brought to CNS where they are integrated to create sensations * Conscious or subconscious decisions are made and acted upon by motor functions * Motor (efferent)- nerves transmit messages from CNS to effectors *
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