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A reflex is an involuntary and nearly instantaneous movement in response to a stimulus The reflex is an automatic response to a stimulus that does not receive or need conscious thought as it occurs through a reflex arc Reflex arcs act on an impulse before that impulse reaches the brain A reflex arc can be considered a 'short cut' in the nervous system It bypasses the brain for a quick response The components are (see also image) Receptor a specialized part of a neuron that receives a signal;Test bank Questions and Answers of Chapter 29 Reflex Arc and Somatic Reflexes Test bank Questions and Answers of Chapter 29 Reflex Arc and Somatic Reflexes Sign up Login Topics topic Biology studyset Human Anatomy and Physiology Previous Quiz Next Quiz Quiz 29 Reflex Arc and Somatic Reflexes Unlock quiz Biology 16 All Questions 11 Multiple Choice 5 Quiz Worksheet What Is A Reflex Arc Study Com Reflex arc questions igcse