Final answer:
The role of afferent nerves in the reflex arc is to transmit sensory information from muscles, joints, skin, and bones towards the brain.
Step-by-step explanation:
The role of afferent nerves in the reflex arc is to transmit sensory information from muscles, joints, skin, and bones towards the brain.
For example, when you touch a hot stove, the afferent nerves in your skin detect the heat and transmit this information to your brain, which then signals your muscles to quickly pull your hand back. This rapid and automatic response is a reflex.