Question

Pacinian corpuscle present in skin detect
A. Pain
B. Temperature
C. Pressure contact
D. Movement

Answer 1

Hint:These receptors create big, onion-like structures in the dermis and hypodermis and contain a myelinated nerve that ends in the central centre of the structure. The exterior layers are made of flattened cells, collagen fibres and lymph-like fluid.

Complete Answer:
The skin contains a large number of sensory receptors. The sense of touch is mediated by a wide network of nerve ends and touch receptors in the skin known as the somatosensory system. We are able to feel sensations of cold, hot, soft, rough, tickle, itch, pain, vibration, etc., due to this system. There are four major categories of receptors within the somatosensory system: mechanoreceptors, thermoreceptors, proprioceptors and pain receptors.

Thermoreceptor is a receptive component of a sensory neuron that codes for absolute and relative temperature changes. Pain receptors sense pain or sensations that can or may inflict injury to the skin and other tissues of the body. About three million pain receptors are present in the body in the skin, bones, blood vessels, and certain organs. Proprioceptors feel the orientation of various body parts with respect to each other and the surrounding environment. Proprioceptors can be located in muscles and tendons, and joint capsules. This location in the body helps these unique cells to sense differences in muscle length and strain.

The Pacinian corpuscle (PC) is a cutaneous mechanoreceptor situated deep inside the skin dermis, which senses high-frequency vibrations inside its large receptive area. The PC consists of lamellae that surround the centre of the nerve fibre. The Pacinian corpuscles are sensitive to mechanical and vibratory pressure.

Thus, the correct answer is option C i.ePressure contact.

Note:These receptors sense stimuli such as strain, vibration, and texture. There are four known forms of mechanoreceptors whose only purpose is to sense the indentations and vibrations of the skin: Merkel's discs, Meissner's corpuscles, Ruffini's corpuscles, and Pacinian corpuscles.