Reflex actions are automatic, involuntary responses to stimuli that occur without conscious thought. They are controlled by the reflex arc, a neural p
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Why can you pull your hand away from a hot object before you feel pain?
Because the reflex arc (sensory neuron → spinal cord → motor neuron) operates at spinal cord level without involving the brain. The response happens (hand withdrawal) before the sensory signal reaches the brain where pain is consciously felt.
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What is the difference between a synapse and a reflex arc?
A synapse is a single junction between two neurons where neurotransmitters are released. A reflex arc is a complete neural pathway from receptor through sensory neuron, spinal cord, motor neuron to effector. A reflex arc contains multiple synapses.
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Can you consciously suppress a reflex action?
Sometimes. Once the brain becomes aware of the reflex action, it can sometimes override it through higher-order motor pathways. For example, you can learn to control the eye-blink reflex partially, but some reflexes like the pupil reflex cannot be consciously controlled.
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