True or false
1. Warm temp increase the release of CO2 from hemoglobin in the peripheral circulation.
2.Exchange of respiratory gases is by diffusion as a result of concentration gradient.
3. Residual air is necessary to maintain patent alveoli and prevent lung collapse.
1. The statement is false. An increase in temperature does not directly affect the release of CO2 from hemoglobin. Instead, it is primarily controlled by the partial pressure of CO2 in the blood. When the partial pressure of CO2 in the peripheral circulation exceeds that of the alveoli, CO2 diffuses out of the blood into the alveolar spaces.
2. The statement is true. The exchange of respiratory gases, including oxygen and carbon dioxide, occurs through diffusion. Diffusion is the passive movement of molecules from an area of higher concentration to an area of lower concentration. In the respiratory system, oxygen diffuses from the alveoli into the bloodstream, while carbon dioxide diffuses from the bloodstream into the alveoli.
3. The statement is true. Residual air refers to the volume of air that remains in the lungs even after a complete exhale. This residual air plays a crucial role in maintaining the patency (openness) of the alveoli and preventing lung collapse. It ensures that the alveoli do not completely collapse, keeping them ready for gas exchange during the next inhalation. The residual air also helps to maintain lung elasticity and prevents the alveoli from sticking together.