The nervous system & sensitivity

The nervous system & sensitivity - The nervous...

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The nervous system
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What is the nervous system made up of? The brain The spinal cord The nerves (neurones) The central nervous system (or CNS for short) is made up of the brain and the spinal cord .
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What is the job of the nervous system? Our survival depends on us being sensitive to our surroundings. We need to be able to detect any changes and be able to respond to them.
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What are our sense organs? The sense organs are: The eyes The ears The nose Tongue skin These organs sense: Light Sound and balance Smell Taste Pressure, pain, temperature
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Our sense organs contain special receptor cells which will detect a change in our surroundings (a stimulus ) The receptor cells will change the stimulus into an electrical impulse which is passed along nerve cells The message will usually go to the brain which will then process it The brain then sends a message along nerves to an effector organ (usually a
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This note was uploaded on 11/07/2011 for the course BIOLOGY 100 taught by Professor Staff during the Winter '08 term at BYU.

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The nervous system & sensitivity - The nervous...

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