Final answer:
Thermoreceptors in the skin detect temperature changes, with cold spots outnumbering warm spots. Cold receptors peak at ~27°C, while warm receptors peak at ~45°C, aiding in our perception of temperature.
Explanation:
Thermoreceptors in the skin detect temperature changes. There are more cold spots than warm spots on the skin, with approximately 7 cold spots and 0.24 warm spots per 100 mm2 on the forearm. Cold receptors have a maximum sensitivity at ~ 27°C, while warm receptors' sensitivity peaks at ~45°C. Comparing signals from warm and cold receptors helps us sense temperature changes.
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