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  • The reflex pathway comprises  Option: 1 One afferent neuron only  <br

The reflex pathway comprises

 

Option: 1

One afferent neuron only

 


Option: 2

One efferent neuron only

 


Option: 3

One afferent and one efferent neuron

 


Option: 4

One afferent and one receptor neuron

 


Answers (1)

best_answer

 

 

As we have learnt:

Reflex Action & Reflex Arc

  • We all have experienced a sudden withdrawal of a body part which comes in contact with objects that are extremely hot, cold pointed or animals that are scary or poisonous.
  • The entire process of response to peripheral nerve stimulation, that occurs involuntarily, i.e., without conscious effort or thought and requires the involvement of a part of the central nervous system is called a reflex action. 
  • The reflex pathway comprises at least one afferent neuron (receptor) and one efferent (effector or excitor) neuron appropriately arranged in a series.
  • The afferent neuron receives a signal from a sensory organ and transmits the impulse via a dorsal nerve root into the CNS (at the level of the spinal cord).
  • The efferent neuron then carries signals from CNS to the effector. 
  • The stimulus and response thus forms a reflex arc as shown below in the diagram

 

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The reflex pathway comprises at least one afferent neuron (receptor) and one efferent (effector or excitor) neuron appropriately arranged in a series. Hence, the correct answer is option c.

Posted by

Ajit Kumar Dubey

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