Which of the following is not true when air is inhaled in the lungs?
A)Number of air molecules in the lungs remains constant.
B)Concentration of air molecules in the lungs increases.
C)Pressure in the lungs decreases.
D)Volume in the lungs increases.

Question

Quizplus · Accepted Answer

When air is inhaled in the lungs, the number of air molecules increases, which causes a decrease in pressure and an increase in volume. However, the concentration of air molecules (the number of molecules per unit volume) may remain the same or even decrease, depending on the temperature and humidity of the air. Thus, choice B is not true.

Which of the Following Is Not True When Air Is