Gas Solubility and Partial Pressure Quiz

Air present inside the alveoli.

The concentration of a gas inside an alveolus is highest at the top left corner of the alveolus.

The concentration of a gas inside an alveolus decreases after breathing.

Excess gas present in the alveoli indicates a higher concentration than normal.

The concentration of a gas changes within the alveoli over time.

The amount of oxygen consumed by the body per minute.

The number of breaths taken per minute.

The pressure exerted by oxygen in the alveoli of the lungs.

A normal PaO2 value is around 100 mmHg.

The body aims to maintain a constant PaO2 despite changes in oxygen consumption and ventilation.

The partial pressure of oxygen (PO2) is the pressure exerted by oxygen in a mixture of gases. It is a key factor in gas exchange in the lungs and tissues.

The atmospheric partial pressure of oxygen (P atm O2) refers to the pressure exerted by oxygen in the air we breathe. It's typically around 160 mmHg.

The partial pressure of oxygen in the blood is the pressure exerted by oxygen in your blood, which can be measured.

The partial pressure gradient is the difference in the partial pressure of oxygen between two areas. This difference drives the movement of oxygen from an area of higher pressure to an area of lower pressure.

Cells constantly use oxygen for energy production, creating a lower partial pressure of oxygen inside the cells compared to the blood. This difference drives oxygen to diffuse into cells.

The diffusion of oxygen across the pulmonary capillaries occurs when oxygen moves from the alveoli, where its partial pressure is higher, into the blood, where its partial pressure is lower.

The diffusion of oxygen across the systemic capillaries occurs when oxygen moves from the blood, where its partial pressure is higher, into the cells, where its partial pressure is lower.

The movement of carbon dioxide from tissues to the blood and then to the lungs follows similar principles to oxygen diffusion, but in the opposite direction.

The partial pressure of carbon dioxide is the pressure exerted by carbon dioxide in a mixture of gases. Its gradient drives the movement of CO2 from tissues to the blood and ultimately to the lungs for expulsion.

The difference in partial pressure of a gas between two areas. In this case, it refers to the difference in partial pressure of oxygen (O2) between the alveoli and the blood.

The difference in partial pressure of carbon dioxide (CO2) between the alveoli and the blood.

The rate at which a gas moves across a membrane depends on the difference in partial pressure between the two sides of the membrane.

Refers to the tendency of a gas to dissolve into a liquid. The higher the solubility, the more easily the gas dissolves into the liquid.

In this context, it means that the partial pressure difference of oxygen (O2) is 10 times greater than the partial pressure difference of carbon dioxide (CO2).

A tiny air sac in the lungs where gas exchange occurs between the air and the blood.

A small branch of a bronchiole, responsible for transporting air to and from alveoli.

Tiny blood vessels surrounding alveoli, responsible for oxygen uptake and carbon dioxide release.

The process of bringing air into and out of the lungs.

A thin membrane, formed by the alveolar wall, the capillary wall, and their shared basement membrane, responsible for gas exchange between the air in the alveoli and the blood in the capillaries.

A type of cell found in the alveoli, responsible for producing surfactant, a substance that reduces surface tension in the alveoli and prevents them from collapsing.

A type of cell found in the alveoli, responsible for gas exchange.

A type of cell found in the alveoli, responsible for engulfing and removing foreign particles, such as bacteria and dust.