17 Questions
What is the primary function of external respiration?
Uptake of O2 and excretion of CO2 in the lungs
What is the total surface area of the alveoli?
70 m2
What is the function of type II pneumocytes in the alveoli?
Production of surfactant
What is the name of the process by which air enters and leaves the lungs?
Pulmonary ventilation
What is the name of the part of the respiratory tract that includes the trachea and bronchi?
Lower airways
What is one of the nonrespiratory functions of the respiratory system?
Voice production
What percentage of the tidal volume is accounted for by the diaphragm?
60-75%
What is the term for breathing at a higher frequency?
Tachypnea
Which muscle is NOT an auxiliary-accessory-inspiratory muscle?
Diaphragm
What is the term for the sensation of breathlessness in the recumbent position?
Orthopnea
What is the term for normal quiet breathing?
Eupnoea
What is the term for the space in the airways where there is no exchange of oxygen and carbon dioxide between the air and pulmonary capillary blood?
Dead space
What is the primary difference between anatomic dead space and total dead space in healthy individuals?
There is no difference between the two
What is the normal value of anatomic dead space in healthy individuals?
150 ml
How can anatomic dead space be measured?
By analyzing single-breath N2 curves
What is the formula used to calculate total dead space?
PECO2 x VT = PACO2 x (VT - VD)
What is the value of VD in the given example?
150 ml
This quiz covers the basics of respiration, including external and internal respiration, and the factors that affect these processes. Learn about pulmonary ventilation and other essential concepts related to respiration.
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