Internal respiration refers to gas exchange in which location?

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Multiple Choice

Internal respiration refers to gas exchange in which location?

Internal respiration is the exchange of gases between the blood and the body's tissues at the systemic capillaries. Oxygen moves from blood into tissue cells, while carbon dioxide moves from tissues into the blood, driven by diffusion due to partial pressure differences. This happens after blood has been oxygenated in the lungs and is circulating to deliver oxygen to cells. It’s different from external respiration, which is the gas exchange in the lungs at the alveolar surface, and from gas transport in the blood, which is the carriage of O2 and CO2 by the blood. It’s also distinct from cellular respiration, the intracellular use of oxygen by cells to produce energy. So the location described is gas exchange in body tissues.

Internal respiration is the exchange of gases between the blood and the body's tissues at the systemic capillaries. Oxygen moves from blood into tissue cells, while carbon dioxide moves from tissues into the blood, driven by diffusion due to partial pressure differences. This happens after blood has been oxygenated in the lungs and is circulating to deliver oxygen to cells. It’s different from external respiration, which is the gas exchange in the lungs at the alveolar surface, and from gas transport in the blood, which is the carriage of O2 and CO2 by the blood. It’s also distinct from cellular respiration, the intracellular use of oxygen by cells to produce energy. So the location described is gas exchange in body tissues.

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