Which of the Following Is a Function of Periciliary Fluid

question 71

Multiple Choice

Which of the following is a function of periciliary fluid?

• A) It allows only air, but not food or liquid, into the respiratory tract.
• B) It facilitates thickening of the mucus along the respiratory tract.
• C) It acts as the site of gas exchange between the air and blood.
• D) It causes turbulence in inhaled air in the nasal cavity.
• E) It facilitates movement of mucus along the respiratory tract.

---

Definitions:

Chloride Shift

The chloride shift is a process during which chloride ions move from the blood plasma into red blood cells as bicarbonate ions leave, helping maintain ionic balance in blood during gas exchange.

Vital Capacity

The maximum amount of air a person can expel from the lungs after a maximum inhalation.

Tidal Volume

The amount of air that is inhaled or exhaled during normal breathing with each respiratory cycle.

Residual Capacity

The amount of air remaining in the lungs after a normal expiration, critical for continuous gas exchange between breathing cycles.