Question

Schneiderian membrane occurs on
A. Larynx
B. Nasal Turbinals
C. Maxiloturbinals
D. Ethmoturbinals

Answer 1

Hint: The Schneiderian membrane is also referred to as the Schneiderian epithelium. This membrane is known to line the nasal cavity as well as the paranasal sinuses. It comprises a periosteum having connective tissues that are highly vascularized and a thin layer of a pseudostratified ciliated epithelium.

Complete answer:
The Schneiderian membrane lines the inner portion of the maxillary sinus cavity. It is a mucous membrane consisting of pseudostratified ciliated columnar cells which are characteristically ectodermal in origin, featuring the goblet cells. Moreover, Schneiderian membrane has been observed as a bilaminar membrane on observation under a microscope. In different skulls, a variation in sinuses in terms of size has been observed. Also, the size of sinuses varies even on the two different sides of the same skull. Schneiderian membrane is found in the nasal chamber responsible for sensing smell due to the presence of olfactory receptors in them.
Thus, the right option is C.

Note: Maxillary sinuses are a form of paranasal sinus which is represented by an empty space in the bones covering the nose. Maxillary bones are located in the cheek region beside the nose. These bones contain large maxillary sinuses. These sinuses are lined via mucus producing cells which keep the nose moist.