Which corpuscle is responsible for sensing heat in the skin?

The Ruffini corpuscle is responsible for sensing heat in the skin. This specialized mechanoreceptor is located deep within the skin and is designed to detect sustained pressure and skin stretch. While primarily associated with the sensation of skin stretch, Ruffini corpuscles also contribute to the perception of temperature, particularly warmth. They play a significant role in providing sensory feedback when the skin comes into contact with warmer objects.

In contrast, while other types of corpuscles and cells play important roles in the sensory system, their primary functions differ. For instance, Meissner corpuscles are more sensitive to light touch and vibrations, Pacinian corpuscles are primarily involved in detecting deep pressure and high-frequency vibrations, and Merkel cells are associated with slow, sustained pressure and texture perception. Understanding the specific functions of these sensory receptors clarifies why the Ruffini corpuscle is the correct choice for sensing heat.