What is the function of the sensory system?

• A. To receive stimuli to allow the body to react to changes
• B. To regulate digestion
• C. To store memories
• D. To produce hormones

Answer: (A)

Detecting and responding to changes in the environment is the job of the sensory system. Receptors in the skin, eyes, ears, tongue, and nose pick up stimuli such as touch, light, sound, taste, and smell. These signals are carried to the brain, where they are interpreted so you can perceive what’s happening and trigger appropriate actions—like pulling your hand away from a hot surface or noticing a scent. This function is distinct from digestion, which handles breaking down and absorbing food; memory storage, which involves brain processes beyond sensing; and hormone production, which is part of the endocrine system.