Which of the following best describes what is happening in the diagram above?

Question 1 options:

The alveolus is a part of the lung and assists with gas exchange. The goal is to get gases into and out of the cells, so they enter our body, go to our lungs and then diffuse into our blood and travel to our cells through our circulatory system.

The alveolus assists with the movement of glucose into our cells. Sugar gets into our bodies and then moves into our blood and makes it way to our cells where it is used for cellular respiration.

The alveolus assists our body in thermoregulation. This is a part of the nervous system and when glucose and gases get in, it sends a signal to our brain that there is trouble. Our blood then works to regulate this issue to bring our body back to homeostasis.

The alveolus is a bone and you can see how it rests next to the blood vessel. It is very important to supply our bones with the nutrients we gather through our blood vessels.

The diagram given here describes the process - The alveolus is a part of the lung and assists with gas exchange. The goal is to get gases into and out of the cells, so they enter our body, go to our lungs and then diffuse into our blood and travel to our cells through our circulatory system.

The alveolus or alveoli are tiny air sacs which is a hollow cup-shaped cavity in the lung parenchyma. It functions as the respiratory unit. It helps in gaseous exchange to and from the lungs.

The gaseous exchange takes place with these sacs.
Diffusion is the process that takes place in this exchange
In this process, oxygen moves from a high concentration area to a low concentration that is alveoli to blood capillaries and then circulates to various cells.
In the case of carbon dioxide, it reaches near the blood capillaries near the alveoli where it diffuses into the lungs through alveoli.

Thus, the correct description is - The alveolus is a part of the lung and assists with gas exchange. The goal is to get gases into and out of the cells, so they enter our body, go to our lungs and then diffuse into our blood and travel to our cells through our circulatory system.

Learn more about diffusion:

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