Which one of the following depicts the correct circuit of a reflex are?

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Q: 36 (NDA-II/2018)

Which one of the following depicts the correct circuit of a reflex are?

question_subject: 

Science

question_exam: 

NDA-II

stats: 

0,2,8,5,2,2,1

keywords: 

{'reflex': [0, 0, 0, 1], 'sensory neuron': [0, 0, 0, 1], 'correct circuit': [0, 0, 0, 1], 'motor neuron': [0, 0, 0, 1], 'receptor': [0, 0, 0, 1], 'neuron': [2, 0, 0, 1], 'sensory': [0, 0, 0, 1], 'effector': [0, 0, 0, 1], 'spinal cord': [2, 0, 1, 1], 'brain': [1, 0, 0, 1]}

Option 2 is the correct answer which depicts the correct circuit of a reflex arc. Let`s break down each component of the circuit to understand why this option is correct.

Receptor: The reflex arc begins with a receptor, which detects a stimulus. The receptor could be something like a sensory nerve ending that detects pain or pressure.

Sensory neuron: Once the receptor detects a stimulus, it sends the signal to the sensory neuron. The sensory neuron carries this signal towards the central nervous system (spinal cord or brain) for processing.

Spinal cord: In the case of a spinal reflex arc, the signal from the sensory neuron reaches the spinal cord. The spinal cord acts as a relay station and quickly processes the information.

Motor neuron: After being processed in the spinal cord, the signal is sent to a motor neuron. The motor neuron carries the response signal away from the spinal cord towards the effector.

Effector: The effector is the muscle or gland that carries out the response. It receives the signal from the motor neuron and produces the appropriate action, such as contracting or secreting a substance.

Therefore, option 2 accurately represents the correct circuit of a reflex arc, starting with the receptor, followed by the sensory neuron, spinal cord, motor neuron, and