A person on a strict diet and exercise regimen lost 7 kg (about 15 pounds) of body fat in just two weeks. What is the most likely way that the lost fat left the body?
A) It was released as CO₂ and H₂O.
B) It was converted to heat and then released.
C) It was converted to ATP, which weighs much less than fat.
D) It was eliminated from the body as faeces.

Question

Quizplus · Accepted Answer

When the body breaks down fat molecules for energy, it ultimately releases the carbon atoms as CO₂, which is then exhaled, and the hydrogen atoms bond with oxygen to form water (H₂O), which is excreted through urine, sweat, and breath. Therefore, it is most likely that the lost fat left the body as CO₂ and H₂O.

A Person on a Strict Diet and Exercise Regimen Lost