Ch 22 Respiratory System Flashcards
What is considered pulmonary ventilation?
Movement of air in and out
What is external respiration?
O2 and CO2 exchange between blood and lungs
From top to bottom what are the regions of the Pharynx?
Nasopharynx, Oropharynx, laryngopharynx
What structure protects the trachea from food entering it?
Epiglottis
At the _____ food and air are separated by the _______.
At the LARYNX food and air are separated by the EPIGLOTTIS
Name the structures starting from Trachea down to the alveoli
Trachea—>Main Bronchus—>Lobar Bronchus—–>Segmental Bronchus—>Terminal bronchiole—> alveolar duct—> Alveoli
How many times do Bronchi branch before you get to brochioles and alveolar sacs?
23 times
How many alveolar sacs are there?
about 300 million
The left and right primary branches have ___ cartilage and ____ smooth muscle.
Have high amounts of cartilage and little amount of smooth muscle
What effect does the SNS have on secondary bronchi?
causes vasodilation
What is Boyle’s law?
Pressure1 x Volume1=Pressure2 x Volume 2
If the intrapulmonary pressure is higher than the intrapleural pressure what happens?
This is normal the internal pressure is always higher then the pleural cavity so the lung can expand.
What happens when the diaphragm contracts?
The lung will expand lowering the intrapulmonary pressure so air will rush in
What is the formula for Boyle’s law?
(P1)(V1)=(P2)(V2)
What is the cell type that produces surfactant?
Type II alveolar cell
