Lesson eLearning

In a withdrawal reflex, which of the following is the correct sequence of components from receptor to effector?

medium MCQ 2 marks Class 10 · Science · Control and Coordination
  1. Receptor → Sensory neuron → Interneuron → Motor neuron → Effector muscle
  2. Receptor → Interneuron → Sensory neuron → Motor neuron → Effector muscle
  3. Receptor → Sensory neuron → Motor neuron → Interneuron → Effector muscle
  4. Receptor → Motor neuron → Interneuron → Sensory neuron → Effector muscle
Answer
Receptor → Sensory neuron → Interneuron → Motor neuron → Effector muscle

The correct answer is Receptor → Sensory neuron → Interneuron → Motor neuron → Effector muscle — The correct order is therefore: receptor, sensory neuron, interneuron, motor neuron, effector muscle.

Step-by-step solution

  1. Identify the starting point: the receptor detects the stimulus.
  2. Determine the first neuron: a sensory neuron carries the signal to the spinal cord.
  3. Recognise the second neuron: an interneuron processes the signal within the cord.
  4. Identify the third neuron: a motor neuron carries the response to the muscle.
  5. Finish with the final element: the effector muscle contracts.
  6. The correct order is therefore: receptor, sensory neuron, interneuron, motor neuron, effector muscle.
Common mistake: Reversing the order of sensory and interneuron

Concept tested: Neural pathway of withdrawal reflex

Published · How this solution was prepared and checked

← All Control and Coordination questions