TYK30

During spontaneous respirations, the major contribution to the total respiratory resistance is by which of the following?

A. Nasal airway and mouth

B. Glottis

C. Trachea

D. Bronchi

E. Bronchioles

Answer

The answer is A. The nose, mouth and large airways constitute the major components of airway resistance.^[1]

↑ LeSouef PN, England SJ, Bryan AC. Total resistance of the respiratory system in preterm infants with and without an endotracheal tube. J Pediatr. 1984 Jan;104(1):108-11.[1]

Carl F Doershuk and LeRoy W Matthews. Airway Resistance and Lung Volume in the Newborn Infant Pediatric Research (1969) 3, 128–134.