Respiratory System Questions Flashcards
Air and food are routed into the proper channels by
pharynx
Unlike inspiration, expiration is a passive act because no muscular contractions are involved. Expiration, however, depends on two factors. Which of the choices below lists those two factors?
the recoil of elastic fibers that were stretched during inspiration and inward pull of surface tension due to the film of alveolar fluid
The relationship between the pressure and volume of gases is given by __________.
Boyle’s law
The statement, “in a mixture of gases, the total pressure is the sum of the individual partial pressure of gases in the mixture” paraphrases __________.
Dalton’s law
The most powerful respiratory stimulus for breathing in a healthy person is:
increase of carbon dioxide
The lung volume that represents the total volume of exchangeable air is the ________.
vital capacity
Which of the following is not a stimulus for breathing?
rising blood pressure
Respiratory control centers are located in the ____.
medulla and pons
Which statement about carbon dioxide is incorrect?
Its accumulation in the blood is associated with decrease in pH
Which respiratory associated muscles would contract if you were to blow up a balloon?
internal intercostals and abdominal muscles would contract
How is the bulk of carbon dioxide carried in the blood?
as the bicarbonate ion in the plasma after first entering the red blood cells
Which of the following provide the greatest surface area for gas exchange?
alveoli
Most inspired particles such as dust fail to reach the lungs because of the ________.
ciliated mucous lining in the nose
Internal respiration is defined as:
gas exchange between systemic blood vessels and tissues
The structures composed of elastic fibers that form mucosal folds with a medial opening called the glottis are called:
vocal folds
