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Science(The sensory system)

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
What is a stimulus?   Anything in our surroundings that causes us to take action  
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If sight is the sense what is the sense organ?   The eyes  
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If hearing is the sense what is the sense organ?   The ears  
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If smell is the sense what is the sense organ?   The nose  
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If touch is the sense what is the sense organ?   The skin  
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If taste is the sense what is the sense organ?   The tongue  
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What is the central nervous system?   It consists of the brain and the spinal cord.  
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What is the brain?   A complex structure containing many millions of nerve cells  
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What is the spinal cord?   Contains many nerves witch take messages to and from the the brain  
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What is a neuron?   A nerve cell  
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What do sensory neurons do?   Carry messages to the brain or central nervous system. They make us aware of a stimulus  
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What motor neurons do?   Carries messages away from the brain or central nervous system to a muscle.They cause us to carry out a response  
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What is the iris?   The coloured part at the front of the eye. Its function is to expand or contract to the amount of light entering the eye  
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What is the pupil?   The black circle in the middle of the iris. Its function is to allow light enter the eye  
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In bright light the pupil shrinks, why is this?   To prevent to much light entering the eye  
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In dim light the pupil enlarges,why is this?   To allow more light to enter the eye  
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What is the lens?   It changes shape depending on weather we are looking at a near or far object  
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why do some people need glasses/contacts?   If their lens does not take up the correct shape and things appear blurred  
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What is the retina?   A light sensitive layer at the back of the eye. The function of it is to absorb light and allow us to see  
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What does the optic nerve do?   Carries messages from the eye to the brain  
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What is the cornea?   The transparent section of the covering of the eye. Its function is to allow light to pass into the eye  
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What is the ciliary muscle?   It surrounds the lens and contracts and relaxes shapes to cause the lens to change shape  
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Created by: Chimozukee
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