Krause end bulbs detect cold; Ruffini endings detect warmth. Which option best reflects this pairing?

• A. Cold; Warmth
• B. Warmth; Cold
• C. Mechanical; Temperature
• D. Temperature; Pain

Answer: (A)

The main idea is matching specific skin receptors to temperature sensations. Krause end bulbs are described here as detecting cold, while Ruffini endings are described as detecting warmth. So the pairing that fits this mapping is Cold; Warmth. In other contexts, warmth and cold are often associated with different thermoreceptors, but this item uses these specific receptor labels, making Cold paired with Krause end bulbs and Warmth with Ruffini endings the best reflection.