Question 2

Hair-follicle receptors are located on any skin area.

Hair-follicle receptors are specialized somatosensory receptors that are distributed throughout the skin, allowing them to respond to touch and movement around hair follicles.

A) Krause end bulbs

Krause end bulbs are thermoreceptors that are primarily associated with cold sensation and are found in specific areas, such as the skin of the lips and certain mucous membranes, rather than being located on any skin area.

B) Pacinian corpuscles

Pacinian corpuscles are mechanoreceptors that respond to deep pressure and vibration but are not present on all skin areas; they are primarily found in deeper layers of the skin and are more concentrated in areas where pressure sensitivity is crucial.

C) Hair-follicle receptors

Hair-follicle receptors are indeed located on any skin area that contains hair follicles, making them more widespread compared to other types of receptors, which is why this option is correct.

D) Meissner's corpuscles

Meissner's corpuscles are mechanoreceptors sensitive to light touch and are primarily located in the dermal papillae of glabrous (hairless) skin, such as the fingertips and palms, rather than being distributed over all skin areas.

Conclusion

Hair-follicle receptors are uniquely positioned to be present in any skin area with hair, which distinguishes them from the other options that have more limited distributions. While other receptors respond to different types of stimuli, they do not cover the full range of skin areas like hair-follicle receptors do. This makes option C the definitive correct answer.