The nurse is reviewing the development of the newborn infant. ...

[jenna1]

The nurse is reviewing the development of the newborn infant. Regarding the sinuses, which statement is true in relation to a newborn infant?
 
  a. Sphenoid sinuses are full size at birth.
  b. Maxillary sinuses reach full size after puberty.
  c. Frontal sinuses are fairly well developed at birth.
  d. Maxillary and ethmoid sinuses are the only sinuses present at birth.

Question 2

The projections in the nasal cavity that increase the surface area are called the:
 
  a. Meatus.
  b. Septum.
  c. Turbinates.
  d. Kiesselbach plexus.

[nikmaaacs]

Answer to Question 1

ANS: D
Only the maxillary and ethmoid sinuses are present at birth. The sphenoid sinuses are minute at birth and develop after puberty. The frontal sinuses are absent at birth, are fairly well developed at age 7 to 8 years, and reach full size after puberty.

Answer to Question 2

ANS: C
The lateral walls of each nasal cavity contain three parallel bony projections: the superior, middle, and inferior turbinates. These increase the surface area, making more blood vessels and mucous membrane available to warm, humidify, and filter the inhaled air.