Tactile nerve endings, tactile corpuscles, bulbous corpuscles, and lamellated corpuscles are all types of:
a. Nociceptors
b. Mechanoreceptors
c. Photoreceptors
d. Chemoreceptors

Mechanoreceptors are specialized sensory receptors that respond to mechanical pressure or distortion. They play a crucial role in the sensation of touch, vibration, and proprioception. The types mentioned in the question, such as tactile corpuscles and bulbous corpuscles, are all mechanoreceptors that detect different forms of mechanical stimuli.

Tactile nerve endings, also known as free nerve endings, are sensory receptors located in the skin that respond to light touch. They are responsible for detecting fine tactile sensations and are distributed throughout the skin, providing essential information about the external environment.

Corpuscles, such as tactile corpuscles (Meissner's corpuscles) and lamellated corpuscles (Pacinian corpuscles), are encapsulated mechanoreceptors that enhance sensitivity to specific types of mechanical stimuli. Tactile corpuscles are sensitive to light touch and vibration, while lamellated corpuscles respond to deep pressure and high-frequency vibrations, illustrating the diversity of mechanoreceptive functions.