Pulmonary Physiology Flashcards
How does pulmonary ventilation work?
Air moves into the lungs when the pressure inside the lungs is less than atmospheric pressure (1 atm or 760 mmHg)
How is alveolar air different from regular air?
Alveolar air has less O2 since it is absorbed by blood
T/F Expired air had more O2 and less Co2 than alveolar air.
True
T/F the pulmonary trunk delivers oxygenated blood out of the lungs, bronchial arteries branch off the aorta to supply deoxygenated blood from the lungs
False. The pulmonary trunk delivers deoxygenated blood out of the lungs, bronchial arteries branch off the aorta to supply oxygenated blood to the lungs
What is the difference between inspiration and expiration?
Inspiration happens when intrathoracic pressure falls, ribs are lifted by muscles, and the diaphragm contracts.
Expiration is a passive process. Alveolar pressure increases, and air is pushed out.
T/F breathing can be sympathetic or parasympathetic
True
What is Boyle’s Law?
As the size of a closed container decreases, the pressure inside increases. This is because the molecules have less wall area to strike.
T/F it is possible to breathe out ALL of the air in your lungs.
No it is not
What is breathing apnea?
Temporary cessation of breathing
Downhill. That’s where
What is the term for difficult or labored breathing?
Dyspnea
T/F Eupnea is normal breathing.
True
T/F Tachypnea is normal breathing.
False. Tachypnea is rapid breathing.
Describe Henry’s Law.
The quantity of gas that will dissolve in a liquid depends on the amount of gas present and its solubility coefficient
What effect describes how hemoglobin’s oxygen binding affinity is inversely related to both acidity and the concentration of CO2
Bohr effect
