Medical Mcqs

Functional importance of maxillary sinus is______________?
  • (A)  Lightening of skull weight and production of bactericidal lysozyme to the nasal cavity
  • (B)  Protects the brain against exposure to cold air by arresting air in sinus temporarily
  • (C)  Resonance of voice and enhancement of faciocranial resistance to mechanical shock
  • (D)  All of the above
The maxillary sinus______________?
  • (A)  Opens in to the inferior meatus of nose
  • (B)  Has the 1st molar projecting into its floor
  • (C)  Is fully developed by the age of 8 years
  • (D)  Has good drainage in upright position