Final answer:
Pacinian corpuscles, also known as lamellated corpuscles, are sensory receptors in the skin that detect deep pressure and high-frequency vibrations.
Step-by-step explanation:
Pacinian corpuscles, also known as lamellated corpuscles, are sensory receptors that are found in both glabrous (hairless) and hairy skin. More specifically, they are situated deep in the dermis layer and have similar structures to Meissner's corpuscles. Besides the skin, they are also located in other parts of the body such as the bone periosteum, joint capsules, pancreas, breasts, and genitals. These receptors are characterized by their ability to detect deep transient pressure and high-frequency vibration. They adapt rapidly to stimuli through compression, which in turn stimulates their internal dendrites. Compared to Merkel's disks and Meissner's corpuscles, Pacinian corpuscles are less abundant in the skin.
Given the description above, the correct answer to the question, 'What are Pacinian corpuscles, also known as lamellated corpuscles?' is A) Sensory receptors in the skin. They are not cellular structures found in the lungs, microorganisms in soil, or types of nerve cells, which rules out options B, C, and D.