what is knee jeerk ......
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Explanation:
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it is an extensor reflex hammer step in the kneecap or patela which receives the tender of quadriceps muscles
sensory impulse stimulated and reaches spinal cord then the motor impulse generator and then it stimulates the construction of quadriceps and inhibits the contraction of memory to the leg moves away from the body
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(used about a reaction) made automatically, without any serious thought
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