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A REFLEX ARC (e.g., the knee-jerk reflex) is initiated WITHOUT direct brain involvement because:
AThe cerebellum filters all reflexes by default
BReflexes are entirely chemical, not neural
CThe spinal cord directly processes the response (faster)
DThe eyes coordinate the reflex action
Answer & Solution
Correct answer: C. The spinal cord directly processes the response (faster)
Reflex arc: sensory neuron carries signal to SPINAL CORD, which directly sends a motor command back via motor neuron. Bypasses the brain → faster response. Brain receives a copy AFTER. Knee-jerk = patellar reflex.
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