Question

Как изменяется состав воздуха во время дыхания?​

Answer 1

Ответ:

Вдыхаемый воздух содержит 20,94 % кислорода, 0,03 % углекислого газа, 79,03 % азота и паров воды. Поскольку кислород участвует в окислительных процессах, то часть его остается в организме и его доля на выдохе меняется с 20,94 % до 16,3 %. При обмене веществ органы выделяют углекислый газ, который выходит при дыхании и изменяется с 0,03 % до 4 %. Содержание азота и паров воды практически не меняется: 79,03 % – при вдохе, 79,7 % – при выдохе.

Answer 2

Changes in Air Composition During Breathing

During the process of breathing, the composition of air can change in several ways. Here are some key points to consider:

1. Inhalation: When we inhale, we take in air from the environment into our lungs. The air we inhale consists of approximately 78% nitrogen, 21% oxygen, and trace amounts of other gases such as carbon dioxide, argon, and water vapor.

2. Exhalation: When we exhale, we release air from our lungs back into the environment. The composition of exhaled air is different from inhaled air. It typically contains a higher concentration of carbon dioxide and a lower concentration of oxygen compared to inhaled air. Exhaled air also contains water vapor and traces of other gases.

3. Gas Exchange: The exchange of gases between the lungs and the bloodstream occurs during the process of breathing. Oxygen from the inhaled air enters the bloodstream through the alveoli in the lungs, while carbon dioxide, a waste product of cellular respiration, is removed from the bloodstream and exhaled.

4. Respiratory Quotient: The respiratory quotient (RQ) is a measure of the ratio of carbon dioxide produced to oxygen consumed during cellular respiration. The RQ can vary depending on the type of fuel being metabolized. For example, when carbohydrates are metabolized, the RQ is close to 1, indicating that equal amounts of carbon dioxide and oxygen are produced and consumed. When fats are metabolized, the RQ is lower, indicating a higher ratio of oxygen consumed to carbon dioxide produced.

5. Metabolic Rate: The composition of exhaled air can also be influenced by factors such as metabolic rate and physical activity. During periods of increased physical activity, the body's demand for oxygen increases, leading to a higher rate of oxygen consumption and carbon dioxide production. This can result in a higher concentration of carbon dioxide in exhaled air.

It's important to note that the specific changes in air composition during breathing can vary depending on individual factors, such as overall health, altitude, and environmental conditions. The information provided here is a general overview of the topic.

I hope this helps! Let me know if you have any further questions.