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In which zone would the lung have higher arterial pressure than in the venous and alveolar pressure?A. zone 1 b. zone 2 c. zone 3 d. this zone does not exist

Which of the following occurs for expiration to occur? a. the thoracic volume decreases b. the thoracic volume increases c. the intrapulmonary pressure decrease compared to atmospheric air pressure d. the intrapleural pressure becomes more negative

After spending a day or more at high altitude (with an oxygen partial pressure of 75 torr), the concentration of 2,3- bisphosphoglycerate (2,3-BPG) in red blood cells increases. What effect would an increased concentration of 2,3-BPG have on the oxygen-binding curve for hemoglobin? Why would this adaptation be beneficial for functioning well at high altitude?

How is most of the carbon dioxide transported by the blood in humans?   A. Bicarbonate attached to hemoglobin.   B. Bicarbonate ions in the pkasma.   C. Carbon dioxide dissolved in plasma.   D. Carbon dioxide attached to hemoglobin.   E. Carbonic acid in the plasma. it is not D

What is meant by the rhythm of respiration? a. The actual pattern of respirations b. The sound of the patient's breathing c. The number of breathing cycles per minute d. None of the above

In the diagram below, What does H represent? a. Residual volume. b. Functional residual capacity. c. Inspiratory reserve volume. d. Vital capacity. e. Total lung capacity.

Understand the curve showing oxygen’s affinity for hemoglobin. What factors change hemoglobin’s affinity for O2 and how does the plot of Hb’s O2 saturation change?

Upon acute high-altitude exposure (e.g., greater than 8,000 feat above sea level), which of the following factors contribute to the rapid onset of fatigue and "difficulty breathing" that is often observed?  (Keep in mind, this question is NOT asking about chronic adaptations to living at altitude).     a. The Bohr shift   b. A reduced partial pressure of oxygen in the alveoli   c. A reduction in the oxygen saturation in the arterial blood   d. All of the above are contributing factors   e. Only B and C are true

If the alveolar PO2 is 100 mm Hg, the blood leaving the pulmonary capillaries in a normal person will have a PO2 of: Select one: a. 40 mmHg b. 46 mmHg c. 100 mmHg d. 760 mmHg e. 160 mmHg