Distributorless ignition systems (DIS) have been around for almost a decade now, and have eliminated much of the maintenance that used to be associated with the ignition system. No distributor means thereâs no distributor cap or rotor to replace, and no troublesome vacuum or mechanical advance mechanisms to cause timing problems.
Olfactory sensitivity is directly proportional to the area in the nasal cavity near the septum reserved to the olfactory mucous membrane, which is the region where the olfactory receptor cells are located. The extent of this area is a specific between animals species.lfactory sensitivity is directly proportional to the area in the nasal cavity near the septum reserved to the olfactory mucous membrane, which is the region where the olfactory receptor cells are located. The extent of this area is a specific between animals species.
1 The olfactory region is located at the apex of the nasal cavity. 2  It is lined by olfactory cells with olfactory receptors. 3  The respiratory region is the largest, and is lined by ciliated psudeostratified epithelium. 4  Within the epithelium are interspersed mucus-secreting goblet cells.t can be generally divided into three regions; the vestibule, the respiratory region, and the olfactory region: 1  The vestibule refers to the area surrounding the external opening to the nasal cavity. 2  The olfactory region is located at the apex of the nasal cavity.