Identify the parts labelled 1 to 5.

1. Effector 2.Efferent neuron 3.Integration center 4.Afferent neuron 5.Receptor

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1.Receptor 2.Afferent neuron 3.Integration center 4.Efferent neuron 5.Effector

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1.Receptor 2.Afferent neuron 3.Efferent neuron 4.Integration center 5.Effector

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1.Effector 2.Afferent neuron 3.Integration center 4.Efferent neuron 5.Receptor

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Solution

The correct option is B
1.Receptor 2.Afferent neuron 3.Integration center 4.Efferent neuron 5.Effector

Sudden spontaneous, involuntary reaction to a stimulus without involvement of brain is called reflex action.

Eg: Sudden withdrawal of the body part which comes in contact with objects that are extremely hot, cold, pointed.

Reflex arc: Receptor organ → sensory or Afferent neuron → Integration neuron → Motor or Efferent neuron → Effector organ

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