Which term describes the process of breathing that constitutes capillary gas exchange?

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Multiple Choice

Which term describes the process of breathing that constitutes capillary gas exchange?

Respiration is the process that encompasses the actual gas exchange between air in the lungs and the blood, as well as the exchange between blood and tissues via capillaries. This includes external respiration, where oxygen diffuses from the alveoli into pulmonary capillaries and carbon dioxide diffuses out, and internal respiration, where these gases are exchanged at the tissue capillaries. Capillary gas exchange specifically refers to the diffusion step across the alveolar-capillary (and tissue-capillary) membranes that swaps O2 and CO2 with the blood. Ventilation, by contrast, is only the mechanical movement of air in and out of the lungs and does not by itself describe the gas-exchange process. The autonomic nervous system branches regulate breathing patterns but do not define the gas exchange mechanism.

Respiration is the process that encompasses the actual gas exchange between air in the lungs and the blood, as well as the exchange between blood and tissues via capillaries. This includes external respiration, where oxygen diffuses from the alveoli into pulmonary capillaries and carbon dioxide diffuses out, and internal respiration, where these gases are exchanged at the tissue capillaries. Capillary gas exchange specifically refers to the diffusion step across the alveolar-capillary (and tissue-capillary) membranes that swaps O2 and CO2 with the blood. Ventilation, by contrast, is only the mechanical movement of air in and out of the lungs and does not by itself describe the gas-exchange process. The autonomic nervous system branches regulate breathing patterns but do not define the gas exchange mechanism.

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