- A reflex arc is the neural pathway that mediates a reflex action. - The receptor detects the stimulus. - The sensory (afferent) neuron transmits the impulse from the receptor towards the central nervous system (CNS). - The integration center (in simple reflexes, often the spinal cord) processes the signal. - The motor (efferent) neuron transmits the impulse from the CNS to the effector. - The effector (muscle or gland) carries out the response.
Which one of the following depicts the correct circuit of a reflex arc?
Asked in UPSC NDA 2 2018 · Topic: Nervous System (Reflex Actions: Components and Types)
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Answer: B. Receptor—sensory neuron—spinal cord— motor neuron—effector
More Biology questions
- Which of the following is the correct sequence of the components in a reflex arc ? - (1) Muscle $\rightarrow$ Motor neuron $\rightarrow$ Receptor $\rightarrow$ Sensory neuron $ \rightarrow$ Spinal cord - (2) Muscle $\rightarrow$ Sensory neuron $\rightarrow$ Spinal cord $\rightarrow$ Motor neuron $\rightarrow$ Receptor - (3) Receptor $\rightarrow$ Sensory neuron $\rightarrow$ Spinal cord $\rightarrow$ Motor neuron $\rightarrow$ Muscle - (4) Receptor $\rightarrow$ Motor neuron $\rightarrow$ Spinal cord $\rightarrow$ Sensory neuron $\rightarrow$ Muscle
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