recovery from a infection with mumps confers a life long immunity. this is which type of immunity... natural active(NA) , artifical passive... plz explain.... as the ans is NA.. but i feel like its AP
The answer is Natural Active.
1. Infections are NATURAL (and not artificial...)
2. Infective organism ("all by themselves") producing an inflammatory/immune response is an ACTIVE process (the organism is ACTIVELY participating in yielding an immune response)
PASSIVE is like a slow/gradual process (ACTIVE is like FAST/ STAT )...
-->First you take the organism IN VITRO, then you refine it and extract a protein/antigen/antibody... and then you inject it, and then the body responds.
All in all its a lengthy slow process and also in immunity from an organism by a passive process, this organism only PASSIVELY participates (not directly but through Laboratory refining)
when both dentitions are considered what is the life span of dental lamina .. in years.. 1,3,5,9,12... (i think its 5... but just a guess..... )
The answer is 5 years.
This is the period of INITIATION of permanent 3rd molars...
(and CALCIFICATION IS NOT RELATED TO LIFE SPAN OF DENTAL LAMINA, why would it be?)
Embryologically, dental lamina develops into a TOOTH BUD, once a bud develops into a "bell" the dental lamina is no-where but has transformed into: inner and outer enamel epithelium.
So the last bud to form is that of PERMANENT THIRD MOLARS... (5 years; INITIATION)
Mayank. 😎
