mastering respiratory system
A hemoglobin molecule contains ________ globular protein subunits.
2 alpha and 2 beta
The partial pressure of oxygen (PO2) in pulmonary veins during internal respiration is approximately
95 mm Hg.
Low pH alters hemoglobin structure so that oxygen binds less strongly to hemoglobin at low PO2. This increases the effectiveness of
internal respiration.
When the diaphragm and external intercostal muscles contract
the volume of the thorax increases
Alveolar ventilation (VA) refers to the
amount of air reaching the alveoli each minute
If the fluid bond between the parietal and visceral pleura is broken and the lung collapses, the resulting condition is termed
atelectasis
Most of the carbon dioxide in the blood is transported as
bicarbonate ions
Most of the oxygen transported by the blood is
bound to hemoglobin
The respiratory center is housed in the ________ of the brain.
brain stem
The "C" in COPD stands for
chronic
The obstructive lung disease in which elastic fibers are lost, leading to collapse of alveoli and bronchioles, is called
emphysema
When there is no air movement, the relationship between the intrapulmonary and atmospheric pressure is that
equal
Air moves out of the lungs when the pressure inside the lungs is
greater than the pressure in the atmosphere
The condition of having low tissue oxygen levels is known as
hypoxia
in quiet breathing
inspiration involves muscular contractions and expiration is passive
Absorption of O2 from blood and release of CO2 from tissue cells is known as
internal respiration
Boyle's law states that gas volume is
inversely proportional to pressure
movement of air into and out of the lungs
movement of air into and out of the lungs
The condition resulting from inadequate production of surfactant and the resultant collapse of alveoli
respiratory distress syndrome
The unit of measurement for pressure specifically preferred by many respiratory therapists is
torr