Question

Cells require o2 to serve as a final electron acceptor in the process of cellular respiration, a series of enzymatic reactions that function to oxidize organic molecules to produce atp. CO₂⁺ is a byproduct of cellular respiration and needs to be removed from tissues. The human respiratory system works with the circulatory system to move these gases around the human body. Below is a series of steps in the process of gas exchange. Reorganize the steps so that they are in the correct order. We have listed the first step in this process below (see 'start'). Organize the remaining steps.

Answer 1

The sequence of gas exchange for cellular respiration involves inhaling oxygen, which then diffuses into the blood, reaches the cells for ATP production, and results in carbon dioxide being returned to the lungs for exhalation.

Step-by-step explanation:

The process of gas exchange during cellular respiration is fundamental to the survival of human cells, and it depends on the close collaboration between the respiratory and circulatory systems. Oxygen enters the lungs and diffuses into the bloodstream, where it is transported to the cells. Here, oxygen is used as the final electron acceptor in cellular respiration, enabling the production of ATP. Carbon dioxide, a byproduct of this process, diffuses from the cells into the bloodstream and is carried back to the lungs to be exhaled. Dysfunction in any part of this exchange system, such as in diseases like asthma or COPD, impairs the delivery of oxygen and the removal of carbon dioxide, adversely affecting cellular respiration.

The correct order of steps in the gas exchange process is:

1. Oxygen is inhaled into the lungs.
2. Oxygen diffuses into the bloodstream from the alveoli.
3. Oxygenated blood is transported to cells throughout the body.
4. Cells use oxygen in cellular respiration to produce ATP and carbon dioxide.
5. Carbon dioxide diffuses from the cells into the bloodstream.
6. Deoxygenated blood carries carbon dioxide back to the lungs.
7. Carbon dioxide is exhaled from the lungs.