How does epithelial tissue contribute to sensation in the skin?

• A. Contains mechanoreceptors such as Merkel cells and specialized nerve endings in the dermis–epidermis junction contributing to tactile sensation.
• B. Provides thermal receptors only in hair follicles.
• C. Does not contribute to sensation.
• D. Only hair, no nerve endings.

Answer: (D)

Epithelial tissue contributes to tactile sensation by housing specialized mechanoreceptors in the epidermis. In particular, Merkel cells in the basal layer of the epidermis form intimate contacts with nearby nerve endings at the dermal–epidermal junction. When the skin is gently deformed, Merkel cells release signals that activate those sensory neurons, translating mechanical stimulation into nerve impulses that travel to the brain. This setup lets you detect light touch and textures. Other sensations like temperature and pain are detected primarily by receptors in the dermis or deeper tissues, and hair follicle receptors reside in the dermis around hair shafts. So, the epidermis contributes to sensation by providing the Merkel cell–neuron system that mediates tactile perception.