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There are many situations which require immediate action without thinking about it for long, in order to prevent further damage such as removing our hand on touching a hot object. So, in such situations, rapid reaction can be obtained by sending signal only to spinal cord and getting the response from it fastly. No time is wasted by sending signal to brain for filtering and analysis in such situations. Such involuntary actions are called reflex actions and they are governed only by spinal cord.
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The advantages are:
(i) This enables the body to give quick responses to harmful stimuli thus protecting the body.
(ii) It minimises overloading of brain.
(iv) In many animals, reflex arcs have evolved as efficient nays of functioning in the absence of true thought processes
(i) This enables the body to give quick responses to harmful stimuli thus protecting the body.
(ii) It minimises overloading of brain.
(iv) In many animals, reflex arcs have evolved as efficient nays of functioning in the absence of true thought processes
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