Question

Identify the parts labelled 1 to 5.

• A. 1. Effector 2.Efferent neuron 3.Integration center 4.Afferent neuron 5.Receptor
• B. 1.Receptor 2.Afferent neuron 3.Integration center 4.Efferent neuron 5.Effector
• C. 1.Receptor 2.Afferent neuron 3.Efferent neuron 4.Integration center 5.Effector
• D. 1.Effector 2.Afferent neuron 3.Integration center 4.Efferent neuron 5.Receptor

Answer 1

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.

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

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