Which of the following lists sensory structures?

• A. Tongue, Nose, Eyes, Ears, and Skin
• B. Brain and spinal cord
• C. Liver and kidneys
• D. Muscles and bones

Answer: (A)

Sensory structures are the organs that detect stimuli from the environment and send signals to the brain for interpretation. The list that includes the tongue, nose, eyes, ears, and skin covers the main sensory organs—taste, smell, sight, hearing, and touch. The tongue detects tastes, the nose detects odors, the eyes detect light and color, the ears detect sound (and balance), and the skin has receptors for touch, temperature, and pain. The other options aren’t sensory structures: the brain and spinal cord process sensory information but aren’t the detectors themselves; the liver and kidneys handle metabolism and excretion; muscles and bones provide movement and support rather than sensing.