To discuss:
The four variables that determine the rate of oxygen loading and carbon dioxide unloading by the blood cells in the alveolar capillaries.
Introduction:
The respiratory system is an organ system that involves the primary organ lungs and it is involved in breathing. Breathing involves inhalation, which is breathing in of air and exhalation which is breathing out of air. The breathing process involves the exchange of gases where oxygen (O2) is inhaled and carbon dioxide (CO2) is exhaled. The air that is inhaled passes through the airways and reaches the alveolar epithelium of the lungs. The pressure of gases in the alveoli is expressed relative to that of the atmospheric pressures.
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Chapter 22 Solutions
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- Gas exchange that occurs at the level of the tissues is called ________. external respiration inteipulmonarv respiration internal respiiation pulmonary ventilationarrow_forwardWhich of the following prevents the alveoli from collapsing? residual volume tidal volume expiratory reserve volume inspiratory reserve volumearrow_forwardUnderwater, we humans cant compete with whales and other air-breathing marine mammals, which can stay submerged for extended periods. At the beach one day you meet a surfer who tells you that special training could allow her to swim underwater without breathing for an entire hour. From what you know of respiratory physiology, explain why she is mistaken.arrow_forward
- An increase in alveolar ventilation without change in metabolic rate (hyperventilation) results in both higher pO2 and pCO2 higher pO2 and lower PCO2 both lower pO2 and pCO2 higher PCO2 and lower pO2arrow_forwardThe events that occur during one cycle of ventilationarrow_forwardIn a healthy lung, an increase in the alveolar Po2 will cause an increase or decrease in the percent saturation of hemoglobin.arrow_forward
- Callisto has managed to escape Xena, and therefore Xena decides to rest for the night in a small but deep cave at a high altitude in the mountains. Explain how the rate of gas exchange between Xena’s alveolar air and blood changes when she moves to high altitude and describe one possible compensatory change that occurs in her body as the consequence.arrow_forwardGAS EXCHANGE Describe the adaptation of the alveoli.arrow_forwardThe formation of oxyhemoglobin at the alveoli requires high pO2, less H+, low pCO2, and decreased temperature. Is this statement correct?arrow_forward
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- Human Biology (MindTap Course List)BiologyISBN:9781305112100Author:Cecie Starr, Beverly McMillanPublisher:Cengage Learning
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