Question

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

Options

• Receptors → Muscles → Sensory neuron → Motor neuron → Spinal cord

• Receptors → Motor neuron → Spinal cord → Sensory neuron → Muscle

• Receptors → Spinal cord → Sensory neuron → Motor neuron → Muscle

• Receptors → Sensory neuron → Spinal cord → Motor neuron → Muscle

Answer 1

Receptors → Sensory neuron → Spinal cord → Motor neuron → Muscle

Explanation - 

Sensory neuron collect signal from the receptor in a reflex arc. This signal moves forward to spinal cord and then through the motor neuron, it reaches to muscles.

Spinal Reflex Arc