BackMark the following statements as true or false. If a statement is false, correct it to make a true statement.
The epithelium of the oropharynx changes from stratified columnar epithelium to simple squamous epithelium to enable it to resist abrasion from food.
As a result of a stroke, Mrs. Minnick's swallowing is uncoordinated. What detrimental effect might this have on her ability to breathe?
During expiration, which action contributes to the movement of air out of the lungs during eupnea, or quiet breathing?
Cary hyperventilates for several minutes before diving into a swimming pool. After he enters and begins swimming underwater, he blacks out and almost drowns. What caused this to happen?
The contraction of the diaphragm and the external intercostal muscles begins inspiration. What happens, in terms of volume and pressure changes in the lungs, when these muscles contract?
Differentiate clearly between minute ventilation and alveolar ventilation rate
Which provides a more accurate measure of ventilatory efficiency, and why?
What is the significance of
(a) Boyle's law, to the process of respiration?
When the diaphragm and external intercostal muscles contract,
(a) Exhalation occurs.
(b) Intrapulmonary pressure increases.
(c) Intrapleural pressure decreases.
(d) The volume of the lungs decreases.
(e) The size of the thoracic cavity increases.
Which muscle is used for inspiration during both eupnea and forced breathing?
Which of the following does not affect the efficiency of pulmonary gas exchange?
a. The surface area of the respiratory membrane
b. The degree of match of ventilation to perfusion
c. The percent saturation of hemoglobin
d. The thickness of the respiratory membrane
Which of the following statements about pulmonary ventilation is false?
a. Normal expiration requires the use of the expiratory muscles to decrease lung volume.
b. The inspiratory muscles increase lung volume, which decreases intrapulmonary pressure.
c. For inspiration to occur, intrapulmonary pressure must decrease below atmospheric pressure.
d. The intrapleural pressure is less than the intrapulmonary pressure; this prevents the lungs from collapsing during expiration.