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During a physical examination, a doctor will usually hit a patients knee on one side with...

During a physical examination, a doctor will usually hit a patients knee on one side with a small hammer. Instantly, the leg jerks upward. Explain what the doctor is testing and indicate the components involved in this process. (4 points)
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Ans: The doctor is testing if the nervous system is functioning properly or not. Doctors often conduct reflex tests ito to ensure that nervous system associated with movement and connective tissue in knee or leg is functioning properly.

Components involved in this process are- A rubber mallet hammer to hit patient knee.

Working- When knee cap tendon (patella) is tapped, quadriceps muscle spindle stretches that sends a signal to the spinal cord. Spinal cord generate reflex arc and induces leg jerk.

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