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18 Cards in this Set

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Define ventilation
The movement of air in and out of the lungs
Define gas exchange
transfer of gases from the air in and out of the lungs and capillary blood
Define Perfusion
Flow of blood into pulmonary circulation
Define Transport
carrying of oxygen and carbon dioxide in the blood
What do control mechanisms do?
regulate the breathing pattern
What is the conducting zone? What does it do? What supplies the conduction zone with blood?
Conducting zone is the upper portionof the airway tree where branching is <17,before alveoli appear. It filters and removes particles, it also warms and humidifies inspired air. Bronchial circulation supplies it with blood.
What is the respiratory system? What does it do? What supplies the respiratory zone with blood?
The lower portion of the airway tree. The function is gas exchange. Blood is supplied by pulmonary circulation.
Inspiration is an(active/passive) process while expiration is an (active/passive) process
inspiration = active, expiration = passive
What is the major muscle of inspiration?
diaphragm
What are the accessory mucles of inspiration and what is their function?
External intercostal muscles - help elevate rib cage
sternocleidomastoid - further elevates rib cage
What muscles are involved in forceful expiration and what is their function?
Internal intercostal muscles - compress the lungs
Abdominal wall - compress the lungs
What does the spirometer measure?
Volume changes during breathing, volumes moved in and out of the lungs, timed or forced vital capacity, tidal volume
What can'tbe directly measured by spirometry?
1. residual volume
2. functional residual capacity
what does the tidal volume determine?
the minute ventilation, which is the amount of air moved in and outof the lungs per unit time
tidal volume x breathing rate = ???
Minute ventilation
(Tidal volume - dead space) x breathing rate = ???
alveolar ventilation
Define vital capacity
is the maximum volume of air that a person can exhale after maximum inhalation. It can also be the maximum volume of air that a person can inhale after maximum exhalation.
define functional residue capacity
(FRC) is the volume of air present in the lungs at the end of passive expiration. At FRC, the elastic recoil forces of the lungs and chest wall are equal but opposite and there is no exertion by the diaphragm or other respiratory muscles.

FRC is the sum of Expiratory Reserve Volume (ERV) and Residual Volume (RV)