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Unit 13 - Respiratory System
Terms in this set (32)
alveolar surface tension
-Attracts liquid molecules to one another at a gas-liquid interface
-Resists any force that tends to increase the surface area of the liquid
tiny sacs of lung tissue specialized for the movement of gases between air and blood
the pressure caused by the weight of the atmosphere
The passages that direct air into the lungs
Constriction, or blockage, of the bronchi that lead from the trachea to the lungs.
Dilation of bronchial airways
Caused by sympathetic ANS activation
Includes respiratory passageways, cleanses, humidifies and warms incoming air
a column-shaped cell found in the respiratory and intestinal tracts, which secretes the main component of mucus.
pressure in the pleural cavity surrounding the lungs
pressure within the alveoli
measure of change in lung volume that occurs with given change in transpulmonary pressure
the tendency of lungs to collapse away from the chest wall
a defense mechanism involving ciliary action and the flow of mucus to rid the respiratory tract of particulate matter and pathogens
general term for cells in the respiratory system
movement of air into and out of the lungs
respiratory gas exchange
O2/CO2 exchange via diffusion
where gas exchange occurs
chemical produced in the lungs to maintain the surface tension of the alveoli and keep them from collapsing
the subdivisions of the respiratory bronchioles, which terminate in the alveolar sacs that resemble clusters of grapes.
smallest branches of the bronchi
A mixture of an acid and a base which resists changes in pH
describing pressure higher than the normal atmospheric pressure
voice box; passageway for air moving from pharynx to trachea; contains vocal cords
Force per unit area.
stress that occurs when forces act to stretch an object
a large membranous tube reinforced by rings of cartilage, extending from the larynx to the bronchial tubes and conveying air to and from the lungs; the windpipe.
production of blood cells
outer layer of pleura lying closer to the ribs and chest wall
the membrane-lined cavity behind the nose and mouth, connecting them to the esophagus.
the inner layer of pleura that surrounds each lung
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