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


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E. Bronchioles
E. Bronchioles
 
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==Answer==
==Answer==
The answer is A. The nose, mouth and large airways constitute the major components of airway resistance.<ref>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.[http://www.ncbi.nlm.nih.gov/pubmed/6361227]</ref>
The answer is A. The nose, mouth and large airways constitute the major components of airway resistance.<ref>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.[http://www.ncbi.nlm.nih.gov/pubmed/6361227]</ref>
==Notes==
==Notes==
<references />
<references />


[http://www.gosh.nhs.uk/health-professionals/clinical-guidelines/arterial-lines/ Arterial lines -Great Ormond Street Hospital]
==Keywords==
==Keywords==
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Carl F Doershuk and LeRoy W Matthews. Airway Resistance and Lung Volume in the Newborn Infant [http://www.nature.com/pr/journal/v3/n2/abs/pr196915a.html Pediatric Research (1969) 3, 128–134.]
Carl F Doershuk and LeRoy W Matthews. Airway Resistance and Lung Volume in the Newborn Infant [http://www.nature.com/pr/journal/v3/n2/abs/pr196915a.html Pediatric Research (1969) 3, 128–134.]
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