Which is the correct sequence of the components of a reflex arc

• GB Life Processes

Which is the correct sequence of the components of a reflex arc?

1. Receptors→ Muscles→ Sensory neuron→ Motor neuron→ Spinal cord
2. Receptors→ Motor neuron → Spinal cord → Sensory neuron → Muscle
3. Receptors → Spinal cord → Sensory neuron → Motor neuron → Muscle
4. Receptors → Sensory neuron → Spinal cord → Motor neuron → Muscle

Answer

A stimulus received by the receptors present on skin, is transmitted to the sensory neuron which carries it to the central nervous system (the spinal cord and brain). A motor neuron carries the message from the central nervous system to the effector which could be a muscle, a gland or both.

The correct option is D.