Respiratory Physiology Flashcards
For the blood drainage of the lungs, they communicate with the pulmonary veins and to the ___ veins and ___vein going back to your inferior vena cava
azygos veins and hemiazygos vein
Blood supply for the bronchi, connective tissues, and visceral pleura comes from ____ - they are branches of the descending aorta
Bronchial Arteries
T or F
Blood supply for the ventricles receives from the pulmonary arteries and their drainage is at the pulmonary veins
FALSE
Blood supply for the alveoli receives from the pulmonary arteries and their drainage is at the pulmonary veins
Alveoli are nourished through ___, they get oxygen from their surroundings since ___ happens to them
Alveoli are nourished through diffusion, they get oxygen from their surroundings since gas exchange happens to them
Why is the hydrostatic pressure at the level of the heart less than the hydrostatic pressure in the lowermost portion of the lungs?
due to the systolic and diastolic pressure present here - this is the second case
Why does vasoconstriction occur?
Vasoconstriction occurs due to sensitivity to vasoconstriction substances and there will be a decrease vasodilator substances
The alveoli are best oxygenated, if there is a decreased oxygen for alveoli, what will happen?
hypoxia occurs and the other normal alveolus, the blood vessels that supply the alveolus will vasoconstrict
For the areas with ___ oxygen, they will vasoconstrict for the blood to reroute in the oxygenated alveolus
For the areas with low oxygen, they will vasoconstrict for the blood to reroute in the oxygenated alveolus
T or F
The alveolar pressure is greater than capillary hydrostatic pressure
TRUE
The hydrostatic pressure at the level of the ___ is less than the hydrostatic pressure in the lowermost portion of the lungs due to the systolic and diastolic pressure present here - this is the second case
heart
What zone occurs at the level of the heart?
Zone 2
(in zone 1),
In the uppermost portion in lungs, why are they hyperinflated?
because air is lighter than fluid so the air goes up
In zone 2 when does this occur?
Systolic bp is greater than the alveolar air pressure
Alveolar air pressure is less than the capillary hydrostatic pressure wherein blood and oxygenation occurs
o During cardiac systole
In zone 2. when does this occur?
Alveolar air pressure is now greater than the capillary hydrostatic pressure
This time no blood occurs because of the compression of capillaries
o During cardiac diastole
T or F
During heavy exercise there is an increase blood flow to the lungs
TRUE
In the lowermost portion, hydrostatic pressure is ?
In the lowermost portion, hydrostatic pressure is high
T or F
in zone 4, The alveolar air pressure is less than the hydrostatic pressure
FALSE
In zone 3, The alveolar air pressure is less than the hydrostatic pressure
Function of Pleural Fluid
o Provide lubrication during inspiration and expiration
o It keeps the two membranes adherent to each other
What is Boyle’s Law?
increase in volume, decrease in pressure
Covers the surfaces of the pleura as a thin film and permits the parietal and visceral pleura to move on each other with minimum friction
Pleural Fluid
o accumulation of water in the lungs
Hydrothorax
o accumulation of blood in the lungs
Hemothorax