During gas exchange, body cells A) take up CO₂ and release O₂. B) release O₂ to red blood cells. C) increase in size to accommodate the reuptake of O₂. D) release CO₂ and take up O₂.

Question

Quizplus · Accepted Answer

During gas exchange, body cells release carbon dioxide (CO2) and take up oxygen (O2) from the surrounding environment. This process is essential for cellular respiration, where cells use oxygen to produce energy and release carbon dioxide as a waste product. Therefore, the correct choice would be D, which states that cells "release CO2 and take up O2." Choices A and B are incorrect because they describe the opposite process, where O2 is released and CO2 is taken up. Choice C is also incorrect because cells do not increase in size during gas exchange, and size has no relation to the uptake or release of gases.

During Gas Exchange, Body Cells