Flashcards in gas exchange Deck (18)
b which mechanism do gasses move between alveoli and capillaries?
what does a conduction airway consist of?
trachea + bronchi + nonrespiratory bronchioles
bronchi containing cartilage do not participate in gas exchange, instead they form what?
anatomical dead space
alveoli consist of how many types of epithelium?
what is the function of type 1 epithelium on alveoli?
what is the function of type 2 epithelium on alveoli?
produce pulmonary surfactant
which alveolar epithelium is most abundant?
type 1 (97%)
what i the function of alveolar macrophages?
how does the structure of alveoli aid gas exchange?
- large SA
- very thin walls
what are the 2 blood supplies to the lungs?
pulmonary circulation and bronchial circulation
what is pulmonary circulation
brings deoxygenated blood from lungs to heart then rest of body
what is bronchial circulation?
brings oxygenated blood to lung parenchyma (portion involved in gas exchange)
which circulation supplies the lung tissue?
what % of total blood vol is in pulmonary circulation at any 1 time?
describe the movement of oxygen and CO2 in the pulmonary circuit
oxygen enters blood
CO2 leaves blood
describe the movement of oxygen and CO2 in the systemic circuit
oxygen leaves blood
CO2 enters blood
which gas, oxygen or CO2, has a greater pressure gradient?