AP BIOLOGY

LABORATORY REVIEW

CELL RESPIRATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
You have a friend who lost 7 kg of fat on a ʺlow carbohydrateʺ diet. How did the fat leave her body?
A
chemical energy was converted to heat then released
B
It was released as CO2 and H20
C
It was converted to ATP
Explanation: 

Detailed explanation-1: -The correct answer is that fat is converted to carbon dioxide and water. You exhale the carbon dioxide and the water mixes into your circulation until it’s lost as urine or sweat. If you lose 10 pounds of fat, precisely 8.4 pounds comes out through your lungs and the remaining 1.6 pounds turns into water.

Detailed explanation-2: -Your body must dispose of fat deposits through a series of complicated metabolic pathways. The byproducts of fat metabolism leave your body: As water, through your skin (when you sweat) and your kidneys (when you urinate). As carbon dioxide, through your lungs (when you breathe out).

Detailed explanation-3: -Research shows that 84% of fat loss is exhaled as carbon dioxide. The remaining 16% of fat is excreted as water. During the conversion of energy, carbon dioxide, and water are byproducts of waste. They are excreted via urine, perspiration, and exhalation.

Detailed explanation-4: -The bottom line When your body uses fat for fuel, the byproducts of fat metabolism are often excreted through urine. While peeing more frequently is unlikely to lead to weight loss, increasing your intake of water may support your weight loss goals.

There is 1 question to complete.