Which statement is true regarding alveoli? (Select all that apply.)
A) The number of functioning alveoli is determined by birth.
B) The alveoli begin to increase in size starting at 8 years of age.
C) The complexity of the alveoli increases into adulthood.
D) These structures produce surfactant.
E) Capillaries are the origin of alveoli.

Question

Quizplus · Accepted Answer

Capillaries grow into the distal respiratory units that keep subdividing (alveolarization)to maximize the surface area for gas exchange.The number of alveoli continues to increase during the first 5 to 8 years of life,after which the alveoli increase in size and complexity.Surfactant is a lipid-protein mix that is produced by type II alveolar cells.

Which Statement Is True Regarding Alveoli? (Select All That Apply