Question

which of the receptor types contributes to the sense of touch by responding to light pressure? five types of sensory receptors. letter 'a' refers to a thin branched thread spreading between fibers. letter b refers to thin thread wrapping around two intrafusal fibers. letter c refers to a thin branched thread wrapping around a bulb-shaped structure with a long extending outgrowth. letter d refers to an oval structure. a thread covered with a bead-like thick layer enters this structure. letter e refers to a thread ending with a bulb-shaped structure near the tactile cell. a b d e

Answer 1

Tactile (Meissner) corpuscles and Merkel cells are the types of receptors that contribute to the sense of light touch, with Meissner's responding quickly and Merkel cells adapting slowly.

Step-by-step explanation:

The type of receptor that contributes to the sense of touch by responding to light pressure is the tactile (Meissner) corpuscle. These are rapidly adapting, encapsulated sensory receptors found in the glabrous skin, which detect touch, low-frequency vibration, and flutter. Another receptor responsible for the sensation of light touch is the Merkel cell, also known as type I cutaneous mechanoreceptor, which is slowly adapting and found in fingertips and lips.