EVERYDAY SCIENCE

Detailed explanation-1: -Exteroceptors and Mechanoreceptors The afferent nerve endings that sense stimuli originating from outside of the body, such as touch, vibration, pain, vision, and sound, are called exteroceptors. ‘Extero’ in exteroceptors implies something from the outside.

Detailed explanation-2: -Nerve Endings There are typically three encapsulated types of joint receptors. These resemble pacinian corpuscles, Ruffini endings, and Golgi tendon organs. There is also a nonencapsulated type of nerve ending that is thought to be a nociceptor specific for pain associated with movement.

Detailed explanation-3: -Free nerve endings detect touch, pressure, stretching, as well as the tickle and itch sensations. Itch sensations are caused by stimulation of free nerve ending from chemicals.

Detailed explanation-4: -There are four primary tactile mechanoreceptors in human skin: Merkel’s disks, Meissner’s corpuscles, Ruffini endings, and Pacinian corpuscle; two are located toward the surface of the skin and two are located deeper.