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Read the following statements w.r.t. Knee-jerk reflex and choose the correct answer.
(A) Interneuron initiates impulse in one or more motor or efferent neurons.
(B) Reflex pathway comprises of at least one afferent neuron and one efferent neuron
  • a)
    Both statements are correct
  • b)
    Both statements are incorrect
  • c)
    Only statement A is correct
  • d)
    Only statement B is correct
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
Read the following statements w.r.t. Knee-jerk reflex and choose the ...
Knee-jerk reflex is a type of reflex that occurs in response to a sudden stretch or tap on the patellar tendon, which causes the quadriceps muscle to contract and the leg to kick out. The reflex pathway comprises of the following components:

Afferent neuron:
- A sensory neuron that carries the signal from the muscle spindle (a sensory receptor) in the quadriceps muscle to the spinal cord
- The signal is transmitted via the dorsal root ganglion, which contains the cell body of the sensory neuron
- The sensory neuron synapses with an interneuron in the spinal cord

Interneuron:
- A neuron that integrates the incoming sensory signal with other signals in the spinal cord
- The interneuron initiates an impulse in one or more motor or efferent neurons

Efferent neuron:
- A motor neuron that carries the signal from the spinal cord to the quadriceps muscle
- The signal causes the muscle to contract and the leg to kick out

Based on the above information, we can determine the correctness of the given statements as follows:

Statement A: Interneuron initiates impulse in one or more motor or efferent neurons.
- This statement is correct, as explained above.

Statement B: Reflex pathway comprises of at least one afferent neuron and one efferent neuron.
- This statement is incorrect, as the reflex pathway comprises of two neurons (afferent and efferent) and an interneuron in between.

Therefore, the correct answer is option 'D' - Only statement B is correct.
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Community Answer
Read the following statements w.r.t. Knee-jerk reflex and choose the ...
Interneuron is absent in knee-jerk reflex.
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Read the following statements w.r.t. Knee-jerk reflex and choose the correct answer.(A) Interneuron initiates impulse in one or more motor or efferent neurons.(B) Reflex pathway comprises of at least one afferent neuron and one efferent neurona)Both statements are correctb)Both statements are incorrectc)Only statement A is correctd)Only statement B is correctCorrect answer is option 'D'. Can you explain this answer?
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