Exteroceptors are receptors that detect surface stimuli.

• A. Detect surface stimuli
• B. Monitor physiological state
• C. Detect deep visceral signals
• D. Exteroceptors detect surface stimuli

Answer: (D)

Exteroceptors are sensory receptors that respond to external stimuli from outside the body. They detect surface-level information such as touch, pressure, and other environmental cues, encompassing senses like skin touch and the external sense organs. That’s why stating that exteroceptors detect surface stimuli is the best fit: it directly links the receptor type to its function and clearly differentiates it from receptors that monitor internal physiological states or visceral signals. The other ideas describe internal sensing (interoception) rather than external, external environmental contact, so they don’t match the category as precisely.