A reflex is our body's automatic response to a stimulus (A stimulus (plural stimuli) is a detectable change in the internal or external environment. ).
The response is predictable, which means it should be the same response to the same stimulus each time, and it's unlearned and automatic, meaning your body doesn't have to 'practice' it, it just knows how to do it. Let us study it in detail through this ppt
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Bio - REflex action.pptx by Saurabh Singh PDF view