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Which is the correct sequence of the components of a reflex arc? A Receptors - Muscle - Sensory neuron - Motor neuron - Spinal cord B Receptors - Motor neuron - Spinal cord - Sensory neuron - Muscle C Receptors - Spinal cord - Sensory neuron - Motor neuron- Muscle D Receptors - Sensory neuron - Spinal cord - Motor neuron - Muscle Which is the correct sequence of the components of a reflex arc?AReceptors - Muscle - Sensory neuron - Motor neuron - Spinal cordBReceptors - Motor neuron - Spinal cord - Sensory neuron - MuscleCReceptors - Spinal cord - Sensory neuron - Motor neuron- MuscleDReceptors - Sensory neuron - Spinal cord - Motor neuron - Muscle
When a receptor is stimulated, it sends a signal to the central nervous system, where the brain coordinates the response. But sometimes a very quick response is needed, one that does not need the involvement of the brain. This is called as the reflex action. In a simple reflex action:Stimulus -> Receptor -> Sensory neuron -> Relay Neuron -> Motor neuron -> Effector (Muscle).So, the correct answer is 'Receptors - Sensory neuron - Spinal cord - Motor neuron - Muscle
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