Water lost through expired air is referred to as __________.

• A. metabolic water
• B. water intake
• C. insensible water loss
• D. water of oxidation

Answer: (C)

Verified step by step guidance

1. Begin by understanding the concept of insensible water loss. This refers to the water that is lost from the body in ways that are not easily measured, such as through evaporation from the skin and respiratory tract.
2. Consider the different ways the body loses water. Insensible water loss occurs through processes like breathing and skin evaporation, which are not directly perceived or measured.
3. Differentiate insensible water loss from other types of water loss such as sensible water loss, which includes measurable losses like urine and sweat.
4. Recognize that insensible water loss is a continuous process and contributes to the body's overall water balance, even though it is not directly noticeable.
5. Understand that insensible water loss is an important consideration in maintaining hydration and homeostasis, especially in conditions where water loss might be increased, such as dry environments or high altitudes.