Lecture 28 - BIOL104-04 Principles of Biology I November 5,...

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Unformatted text preview: BIOL104-04 Principles of Biology I November 5, 2010 Lecture #28 Ch 44 The Nervous System Nervous system organization All animals must respond to environmental stimuli Sensory receptors Detect stimuli Located on the periphery of the body Skin, eyes, ears, nose Internal receptors Detect pH in blood, oxygen levels Motor effectors Respond to stimuli Sensory receptors & motor effectors are linked by the nervous system Nervous system organization Central nervous system (CNS) Brain + spinal cord Integrates information from sensory neurons Interneurons Form connection between sensory neurons & motor neurons Motor neurons send signals to cells in glands or muscles Peripheral nervous system All components of the nervous system that are outside the CNS In vertebrates, this includes sensory & motor neurons Sensory neurons Carry impulses from sensory receptors to CNS Motor neurons Carry impulse from CNS to periphery Flow of information...
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Lecture 28 - BIOL104-04 Principles of Biology I November 5,...

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