Jessica Ong Kai Lin's answer to Aone's Thailand question.

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Jessica Ong Kai Lin
Jessica Ong Kai Lin's answer
8 answers (Tutor Details)
1st
Ans is knee-jerk.
This is known as the reflex arc as the name suggest only happens as a reflex where it goes from sensory to spinal cord and to effector without going to the brain( allow for faster reaction). Knee jerk is where a blow on tendon below the knee cause a kick action ( reflex)