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4:59 814 d2l.laurentian.ca Quiz 3 0:11:50 elapsed Question 17 (1 point) \( \checkmark \) Saved The exchange of \( \mathrm{CO}_{2} \) and \( \mathrm{O}_{2} \) between the blood and the alveoli is called a) expiration b) inspiration c) external respiration d) none of the other answers e) internal respiration

Ask by Stanley Chan. in Canada
Mar 14,2025

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The exchange of \( \mathrm{CO}_{2} \) and \( \mathrm{O}_{2} \) between the blood and the alveoli is called **external respiration**.

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The exchange of \( \mathrm{CO}_{2} \) and \( \mathrm{O}_{2} \) between the blood and the alveoli is referred to as **external respiration**. Here's a brief explanation of the terms: - **Expiration**: The process of breathing out, where air is expelled from the lungs. - **Inspiration**: The process of breathing in, where air is drawn into the lungs. - **External respiration**: The exchange of gases (oxygen and carbon dioxide) between the air in the alveoli and the blood in the capillaries surrounding them. - **Internal respiration**: The exchange of gases between the blood and the body's tissues. Given this information, the correct answer is: **c) external respiration**.

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The correct answer is c) external respiration. This process occurs in the lungs where oxygen from the alveoli diffuses into the blood, while carbon dioxide moves from the blood into the alveoli to be expelled. It’s a crucial part of our respiratory system, ensuring that our cells receive the oxygen they need to function and eliminating waste gases effectively. You might find it interesting that the concept of external respiration has been known since ancient times, with Hippocrates and Galen providing early theories about how the respiratory system works. Their ideas laid the groundwork for our understanding of how gases exchange in the body, paving the way for modern physiology and medicine!

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