Question

What does inspired gas achieve as it moves into the lungs under body temperature and pressure saturated (BTPS) conditions?

a) Warms up to body temperature
b) Cools down to room temperature
c) Experiences a decrease in pressure
d) Becomes desaturated

Answer 1

Inspired gas warms up to body temperature as it enters the lungs under BTPS conditions to ensure efficient gas exchange with the blood, becoming saturated with water vapor in the process.

Step-by-step explanation:

The question refers to what inspired gas achieves as it moves into the lungs under body temperature and pressure saturated (BTPS) conditions. When the inspired gas enters the lungs, it warms up to body temperature, which allows for more efficient gas exchange with the blood. The inspired gas is already at atmospheric pressure and when it reaches the lungs, it is exposed to the humidity and temperature within the respiratory tract, hence it gets saturated with water vapor and warms to body temperature. It's important to note that the pressure does not decrease, nor does the gas become desaturated; rather, it retains the moisture content appropriate for the body's internal environment.