Which type of corpuscle in the papillary layer is sensitive to touch?

The Meissner corpuscle is accurately identified as the type of corpuscle in the papillary layer that is sensitive to touch. These specialized mechanoreceptors are primarily located in the dermal papillae of the skin, especially in areas that are highly sensitive, such as the fingertips and soles of the feet.

Meissner corpuscles are responsible for detecting light touch and changes in texture. They respond quickly to stimuli, making them essential for providing the sense of touch and contributing to tactile perception. Their structure enables them to be particularly responsive to fine touch, giving them a critical role in the sensory function of the skin.

In contrast, Pacinian corpuscles, which are found deeper in the dermis or in subcutaneous tissue, are more associated with sensing deep pressure and vibration rather than light touch. Krause corpuscles are involved in the sensation of cold and are less relevant to touch sensitivity. Merkel cells, while they also function as mechanoreceptors and detect light touch, are differently located and operate alongside other receptors in the epidermis for sustained pressure and texture detection. The specificity of the Meissner corpuscles to light touch makes it the correct answer in this context.