draw a schematic representation of reflex arc of knee jerking

Reflex Action and Reflex Arc

• Involves all sudden responses (involuntary)
• Consists of at least one afferent neuron (receptor) and one efferent neuron (effector)
• Receptor and effector are arranged in series
• Afferent neuron: Receives signal from the sense organ and transmits it to the CNS (spinal cord level)

• Efferent neuron: Carries signal from the CNS to the effector