Test Bank - Chapter 01 Q1: The body’s mechanism for conducting air in and out of the lungs is known as which of the following? A. External respiration B. Internal respiration C. Spontaneous ventilation (Correct) D. Mechanical ventilation Rationale: The conduction of air in and out of the body is known as ventilation. Since the question asks for the body’s mechanism, this would be spontaneous ventilation. External respiration involves the exchange of oxygen (O2) and carbon dioxide (CO2) between the alveoli and the pulmonary capillaries. Internal respiration occurs at the cellular level and involves movement of oxygen from the systemic blood into the cells.
Q2: Which of the following are involved in external respiration? A. Red blood cells and body cells B. Scalenes and trapezius muscles C. Alveoli and pulmonary capillaries (Correct) D. External oblique and transverse abdominal muscles Rationale: External respiration involves the exchange of oxygen and carbon dioxide (CO2) between the alveoli and the pulmonary capillaries. Internal respiration occurs at the cellular level and involves movement of oxygen from the systemic blood into the cells. Scalene and trapezius muscles are accessory muscles of inspiration. External oblique and transverse abdominal muscles are accessory muscles of expiration.
Q3: The graph that shows intrapleural pressure changes during normal spontaneous breathing is depicted by which of the following? A. [Image omitted] B. [Image omitted] (Correct) C. [Image omitted] D. [Image omitted] Rationale: During spontaneous breathing, the intrapleural pressure drops from about -5 cm H2O at end-expiration to about -10 cm H2O at end-inspiration. The graph depicted for answer B shows that change from -5 cm H2O to -10 cm H2O.
Q4: What is the approximant alveolar pressure (PA) during spontaneous inspiration? A. -1 cm H2O (Correct) B. +1 cm H2O C. 0 cm H2O
Pilbeam's Mechanical Ventilation 8e Cairo Test Bank