With eyes closed, an object is placed in a student's hand. The instructor asks the student to identify the object. When he does so correctly, this is primarily the responsibility of:

Question

A) Meissner corpuscles
B) Conical projections
C) Prickle cell lesions
D) Krause end bulbs

Answer 1

Ans: A
Feedback:
Meissner corpuscles are encapsulated mechanoreceptors specialized for tactile discrimination. They are concentrated on the fingertips and palms of the hands, where they account for about half of the tactile receptors. The skin is also supplied by Krause end bulbs, nerve endings contained in a cylindrical or oval capsule. They are found most frequently in the oral cavity, conjunctiva, and genitalia. Although their function is uncertain, they are thought to act as mechanoreceptors and heat detectors. The stratum spinosum is two to four layers thick, consisting of cells commonly referred to as prickle cells because they develop a spiny appearance as their cell borders interact. The papillary dermis lies adjacent to the epidermis and is densely covered with conical projections called dermal papillae.