Multiple choice

Besides urination, another important activity in which water is substantially lost from body is

  1. salivation

  2. defaection

  3. expiration

  4. inspiration

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Expiration (breathing out) causes substantial water loss through water vapor in the breath. The air we exhale is nearly saturated with water vapor from the respiratory tract. Salivation is not a loss activity, defecation involves minimal water compared to breathing, and inspiration brings air into the body.